Method and apparatus for detecting and interpreting path of designated position

ABSTRACT

A method of detecting and interpreting a path of designated positions is disclosed. The method concurrently detects a plurality of designated positions on a touch panel, again detects the plurality of designated positions subsequent to a travel of the designated positions, determines the distances between each of the current designated positions and the respective immediately preceding designated positions, treats an immediately preceding designated position, closest to the current designated position of interest, as the immediately preceding designated position of the current designated position of interest, and acquires the path of each designated position, thereby recognizing the paths of the plurality of designated positions that move concurrently. A combination of the paths of the plurality of designated positions is interpreted to identify a designation input by a user, and an operation thus designated is executed.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a position information processing apparatus, and more particularly, to a position information processing apparatus that detects position coordinates and paths of the position coordinates input by a finger, a pen, or a pointer, and interprets an instruction, input by a user and represented by the path, to perform an operation.

[0003] 2. Description of the Related Art

[0004] Conventional touch panels allow position coordinates of a plurality of contact points to be detected in operation.

[0005] Such a conventional device detects a single input at a point as unknown input data during another point being designated fixedly, and is unable to detect paths of two or more designated positions that are concurrently moving.

[0006] The device thus cannot interpret a designation represented by a combination of paths of a plurality of designated positions that are concurrently moving.

SUMMARY OF THE INVENTION

[0007] It is an object of the present invention to provide an information processing apparatus and an information processing method for detecting paths of at least two designated positions that are concurrently moving.

[0008] It is another object of the present invention to provide an apparatus and method for interpreting a user's designation represented by a combination of paths of at least two designated positions, and for performing a designated operation.

[0009] According to one aspect, the present invention which achieves these objects relates to an information processing apparatus and includes a designated position detector for concurrently detecting a plurality of designated positions, a designated position storage unit for storing the plurality of designated positions detected by the designated position detector, a travel path recognizer for recognizing the travel paths of the plurality of designated positions based on the plurality of preceding designated positions stored in the designated position storage unit and the plurality of current designated positions detected by the designated position detector.

[0010] According to another aspect, the present invention which achieves these objects relates to an operation apparatus and includes a path detector for detecting paths of a plurality of concurrently moving designated positions, a designation interpreter for interpreting a designation represented by a combination of the paths of the plurality of designated positions detected by the path detector, and an operation unit for performing an operation based on the designation interpreted by the designation interpreter.

[0011] According to still another aspect, the present invention which achieves these objects relates to a position information processing method and includes a first detecting step of concurrently detecting a plurality of designated positions, a second detecting step of concurrently detecting a plurality of designated positions subsequent to the first input detecting step, and a travel path recognition step of recognizing the travel paths of the plurality of the designated positions based on the plurality of preceding designated positions detected in the first detecting step and the plurality of current designated positions detected in the second detecting step.

[0012] According to yet another aspect, the present invention which achieves these objects relates to an operational method and includes a path detecting step of detecting paths of a plurality of concurrently moving designated positions, a designation interpreting step of interpreting a designation represented by a combination of the paths of the plurality of designated positions detected in the path detecting step, and an operation step of performing an operation based on the designation interpreted by the designation interpreting step.

[0013] According to another aspect, the present invention which achieves these objects relates to a computer-readable storage medium storing a position information processing program for controlling a computer to perform processing of position information. The program includes codes for causing the computer to perform a first detecting step of concurrently detecting a plurality of designated positions, a second detecting step of concurrently detecting a plurality of designated positions, and a travel path recognition step of recognizing the travel paths of the plurality of the designated positions based on the plurality of preceding designated positions detected in the first detecting step and the plurality of current designated positions detected in the second detecting step.

[0014] According to another aspect, the present invention which achieves these objects relates to a computer-readable storage medium storing a manipulation program for controlling to perform manipulation. The program comprising codes for causing the computer to perform a path detecting step of detecting paths of a plurality of concurrently moving designated positions, a designation interpreting step of interpreting a designation represented by a combination of the paths of the plurality of designated positions detected in the path detecting step, and an operation step of performing an operation based on the designation interpreted by the designation interpreting step.

[0015] Other objects and advantages besides those discussed above shall be apparent to those skilled in the art from the description of a preferred embodiment of the invention which follows. In the description, reference is made to accompanying drawings, which form a part thereof, and which illustrate an example of the invention. Such example, however, is not exhaustive of the various embodiments of the invention, and therefore reference is made to the claims which follow the description for determining the scope of the invention.

[0016] Further objects, features and advantages of the present invention will become apparent from the following description of the preferred embodiments with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017]FIG. 1 is a block diagram showing the hardware structure of an information processing apparatus of one embodiment;

[0018] FIGS. 2A-2C show an example of position inputting using a finger on a touch panel;

[0019]FIG. 3 shows an example of position inputting using a finger on an image pickup device;

[0020]FIG. 4 is a flow diagram showing a process of using a path of a designated position;

[0021]FIG. 5 is a flow diagram showing a process of a path detection;

[0022]FIG. 6 is a flow diagram showing a combination determination process;

[0023] FIGS. 7A-7C show stored designated position data;

[0024]FIGS. 8A and 8B show current designated position data;

[0025] FIGS. 9A-9D show a flow of data that is used in the detection of paths of a plurality of designated positions;

[0026]FIG. 10 is a flow diagram showing a path detection process using the size of a designated area;

[0027]FIG. 11 is a flow diagram showing a combination determination process using the designated area;

[0028]FIGS. 12A and 12B show an area of an acquired current designated position;

[0029] FIGS. 13A-13D show the data of the area of the stored designated positions;

[0030] FIGS. 14A-14D show a flow of data that is used in a process based on the size of the designated area;

[0031]FIG. 15 is a flow diagram showing an operational procedure using the paths of a plurality of designated positions;

[0032]FIG. 16 is a flow diagram showing a process flow of a designation interpretation process;

[0033]FIG. 17 is a flow diagram showing an algorithm for acquiring a change in the distance between designated positions;

[0034]FIG. 18 is a flow diagram showing a designation interpretation process based on the change in the distance between the designated positions;

[0035]FIG. 19 is a flow diagram showing another designation interpretation process based on the change in the distance between the designated positions;

[0036]FIGS. 20A and 20B show an operational example that is interpreted as a contraction operation;

[0037]FIGS. 21A and 21B show the corresponding data samples that are interpreted as the contraction operation;

[0038]FIGS. 22A and 22B show an operational example that is interpreted as an expansion operation;

[0039]FIGS. 23A and 23B show the corresponding data samples that are interpreted as the expansion operation;

[0040]FIG. 24 is a flow diagram showing a designation interpretation process using a change in the angle of designated positions;

[0041]FIG. 25 is a flow diagram showing an algorithm for acquiring the change in the angle of the designated position;

[0042]FIG. 26 is a flow diagram showing a designation interpretation process based on the angle change;

[0043]FIGS. 27A and 27B show an operational example that is interpreted as a clockwise rotation operation;

[0044]FIGS. 28A and 28B show the corresponding data samples that are interpreted as the clockwise rotation operation;

[0045]FIGS. 29A and 29B show an operational example that is interpreted as a counterclockwise rotation operation;

[0046]FIGS. 30A and 30B show the corresponding data samples that are interpreted as the counterclockwise rotation operation;

[0047]FIG. 31 is a flow diagram showing a designation interpretation process that uses a relationship between a designated fixed position and a designated moving position;

[0048]FIG. 32 is a flow diagram showing a designated fixed position detection process;

[0049]FIG. 33 is a flow diagram showing a designation interpretation process based on the direction of travel;

[0050]FIG. 34 is a flow diagram showing a process of determining the direction of travel of a designated position;

[0051]FIG. 35 illustrates the interpretation of angles used in the designated position travel direction determination process;

[0052]FIGS. 36A and 36B show an operational example that is interpreted as a leftward shifting operation;

[0053] FIGS. 37A-37D show the corresponding data samples that are interpreted as the leftward shifting operation;

[0054]FIGS. 38A and 38B show an operational example that is interpreted as an upward shifting operation;

[0055] FIGS. 39A-39D show the corresponding data samples that are interpreted as the upward shifting operation;

[0056]FIGS. 40A and 40B show an operational example that is interpreted as a downward shifting operation;

[0057] FIGS. 41A-41D show the corresponding data samples that are interpreted as the downward shifting operation;

[0058]FIGS. 42A and 42B show an operational example that are interpreted as a rightward shifting operation;

[0059] FIGS. 43A-43D show the corresponding data samples that are interpreted as the rightward shifting operation;

[0060]FIG. 44 is a flow diagram showing a designation interpretation process that uses a change in the distance between a designated fixed position and a designated moving position;

[0061]FIG. 45 is a flow diagram showing a designation interpretation process that uses the change in the distance between the designated positions;

[0062]FIGS. 46A and 46B show an operational example that is interpreted as a contraction operation;

[0063] FIGS. 47A-47D show the corresponding data samples that are interpreted as the contraction operation;

[0064]FIGS. 48A and 48B show an operational example that is interpreted as an expansion operation;

[0065] FIGS. 49A-49D show the corresponding data samples that is interpreted as the expansion operation;

[0066]FIGS. 50A and 50B show an operational example that is interpreted as a contraction operation centered on a designated fixed position;

[0067] FIGS. 51A-51F show the corresponding data samples that is interpreted as the contraction operation centered on the designated fixed position;

[0068]FIG. 52 is a flow diagram showing an algorithm that uses a distance between designated moving positions;

[0069]FIG. 53 is a flow diagram showing a designation interpretation process based on a change in the distance between the designated moving positions;

[0070]FIGS. 54A and 54B show an operational example that is interpreted as a contraction operation;

[0071] FIGS. 55A-55E show the corresponding data samples that are interpreted as the contraction operation;

[0072]FIGS. 56A and 56B show an operational example that is interpreted as an expansion operation;

[0073] FIGS. 57A-57E show the corresponding data samples that are interpreted as the expansion operation;

[0074]FIGS. 58A and 58B show an operational example that are interpreted as an operation for moving a plurality of positions;

[0075] FIGS. 59A-59H show the corresponding data samples that are interpreted as the operation for moving the plurality of positions;

[0076]FIG. 60 is a flow diagram of an algorithm that uses a change in an angle of the designated positions;

[0077]FIG. 61 is a flow diagram showing a designation interpretation process based on the change in the angle of the designated positions;

[0078]FIGS. 62A and 62B show an operational example that is interpreted as a clockwise rotation operation;

[0079] FIGS. 63A-63D show the corresponding data samples that are interpreted as the clockwise rotation operation;

[0080]FIGS. 64A and 64B show an operational example that is interpreted as a counterclockwise rotation operation;

[0081] FIGS. 65A-65D show the corresponding data samples that are interpreted as the counterclockwise rotation operation;

[0082]FIG. 66 is a flow diagram of an algorithm that uses a change in an angle of designated moving positions;

[0083]FIG. 67 is a flow diagram of a designation interpretation process based on the change in the angle of the designated moving positions;

[0084]FIGS. 68A and 68B show an operational example that is interpreted as a clockwise rotation operation;

[0085] FIGS. 69A-69E show the corresponding data samples that are interpreted as the clockwise rotation operation;

[0086]FIGS. 70A and 70B show an operational example that is interpreted as a counterclockwise rotation operation;

[0087] FIGS. 71A-71E show the corresponding data samples that are interpreted as the counterclockwise rotation operation;

[0088]FIGS. 72A and 72B show an operational example that is interpreted as a rotation operation about the center of gravity;

[0089] FIGS. 73A-73H show the corresponding data samples that are interpreted as the rotation operation about the center of gravity;

[0090]FIG. 74 is a flow diagram showing an algorithm that uses a positional relationship between designated positions;

[0091]FIG. 75 is a flow diagram showing an algorithm for determining a positional relationship between designated positions;

[0092]FIG. 76 is a flow diagram showing a designation interpretation process based on the positional relationship between the designated positions;

[0093]FIG. 77 shows an operational example that is interpreted as a vertical shifting operation;

[0094] FIGS. 78A-78D show the corresponding data samples that are interpreted as the vertical shifting operation;

[0095]FIGS. 79A and 79B show an operational example that is interpreted as a lateral shifting operation;

[0096] FIGS. 80A-80D show the corresponding data samples that are interpreted as the lateral shifting operation;

[0097]FIG. 81 is a flow diagram showing a designation interpretation process based on a positional relationship between designated positions;

[0098]FIG. 82 is a flow diagram showing a designation interpretation process based on the positional relationship between the designated positions;

[0099]FIG. 83 is a flow diagram showing an algorithm for acquiring a change in the positional relationship between the designated positions;

[0100]FIGS. 84A and 84B show an operational example that is interpreted as an inversion operation;

[0101] FIGS. 85A-85D show the corresponding data samples that are interpreted as the inversion operation;

[0102]FIGS. 86A and 86B show an operational example that is interpreted as a lateral inversion operation;

[0103] FIGS. 87A-87D show the corresponding data samples that are interpreted as the lateral inversion operation;

[0104]FIGS. 88A and 88B show an operational example that is interpreted as a vertical inversion operation;

[0105] FIGS. 89A-89D show the corresponding data samples that are interpreted as the vertical inversion operation;

[0106]FIG. 90 is a flow diagram showing an algorithm for determining a positional relationship between designated positions;

[0107]FIG. 91 is a flow diagram of a designation interpretation process based on the positional relationship to the designated fixed position;

[0108]FIG. 92 is a flow diagram showing in detail the designation interpretation process based on the positional relationship to the designated fixed position;

[0109]FIG. 93 is a flow diagram showing an algorithm for determining the positional relationship to the designated fixed position;

[0110]FIG. 94 is a flow diagram showing an algorithm for acquiring the direction of travel of a designated position;

[0111]FIGS. 95A and 95B show two operational examples that have different interpretations depending on the positional relationship of designated positions even though the travel directions thereof are the same;

[0112] FIGS. 96A-96D show the corresponding data samples that are interpreted as a next-item operation;

[0113]FIG. 97 is a flow diagram showing an algorithm for determining a positional relationship between designated fixed positions and a designated moving position;

[0114]FIG. 98 is a flow diagram showing an algorithm for determining a positional relationship between designated positions;

[0115]FIG. 99 is a flow diagram showing an algorithm for determining the positional relationship between the designated positions;

[0116]FIG. 100 is a flow diagram showing an algorithm for acquiring a change in the positional relationship between the designated positions;

[0117]FIG. 101 is a flow diagram showing a designation interpretation process based on the positional relationship between the designated fixed positions and the designated moving position;

[0118]FIGS. 102A and 102B show an operational example that is interpreted as a symmetrical inversion operation;

[0119] FIGS. 103A-103E show the corresponding data samples that are interpreted as the symmetrical inversion operation;

[0120]FIG. 104 is a flow diagram showing an algorithm for at least three designated fixed positions;

[0121]FIG. 105 is a flow diagram of a process for determining a positional relationship of a designated moving position with respect to a plurality of designated fixed positions;

[0122]FIG. 106 is a flow diagram of a process for acquiring the positional relationship between the designated positions;

[0123]FIG. 107 shows an operational example which is interpreted to mean that the designated moving position is within an area defined by the designated fixed positions;

[0124] FIGS. 108A-108F show the corresponding data samples which are interpreted to mean that the designated moving position is within the area defined by the designated fixed positions;

[0125]FIG. 109 is a flow diagram showing an algorithm for acquiring the positional relationship between the designated positions;

[0126]FIG. 110A and 110B show an operational example which is interpreted as a shifting operation from within an area;

[0127] FIGS. 111A-111F show the corresponding data samples which are interpreted to mean the shifting operation from within the area;

[0128]FIG. 112 is a flow diagram showing a designation interpretation process based on the positional relationship of a designated moving position to a plurality of designated fixed positions;

[0129]FIGS. 113A and 113B show an operational example that is interpreted to mean that an attribute is imparted to the area defined by the designated fixed positions;

[0130] FIGS. 114A-114F show the corresponding data samples that are interpreted to mean that the attribute is imparted to the area defined by the designated fixed positions;

[0131]FIG. 115 is a flow diagram showing a designation interpretation process based on a change in the count of a plurality of designated positions;

[0132]FIG. 116 is a flow diagram showing a designation interpretation process based on a change in the initial count of designated positions;

[0133]FIGS. 117A and 117B show an operational example that is interpreted to mean that the designation of an object to be processed is on its way;

[0134] FIGS. 118A-118F show the corresponding data samples that are interpreted to mean that the designation of the object to be processed is on its way;

[0135]FIG. 119 is a flow diagram showing a designation interpretation process based on the change in the designated position count;

[0136]FIG. 120 is a flow diagram showing a designation interpretation process based on an initial designated position;

[0137]FIGS. 121A and 121B show an operational example that is interpreted as a rotation operation about a designated position;

[0138] FIGS. 122A-122D show the corresponding data samples which are interpreted as the rotation operation about the designated position;

[0139]FIG. 123 is a flow diagram showing an algorithm that uses a change in the last count of designated positions;

[0140]FIG. 124 is a flow diagram showing a designation interpretation process based on the change in the last count of the designated positions;

[0141]FIGS. 125A and 125B show an operational example that is interpreted as a canceling operation to cancel an immediately preceding operation;

[0142] FIGS. 126A-126F show the corresponding data samples that are interpreted as the canceling operation to cancel the immediately preceding operation;

[0143]FIG. 127 is a flow diagram showing an algorithm that uses designated information other than a designated path;

[0144]FIG. 128 is a flow diagram showing an algorithm that uses designated information other than a designated path;

[0145]FIG. 129 is a flow diagram showing an algorithm that uses the count of all designated positions;

[0146]FIG. 130 is a flow diagram showing a designation interpretation process based on the designated position count;

[0147]FIGS. 131A and 131B show an operational example that is interpreted as a page-turning operation;

[0148] FIGS. 132A-132H show the corresponding data samples that are interpreted as the page-turning operation;

[0149]FIG. 133 is a flow diagram showing an algorithm for acquiring the speed of travel of a designated position as the designated position information other than the designated path;

[0150]FIG. 134 is a flow diagram showing an algorithm for acquiring the speed of travel of the designated position;

[0151]FIG. 135 is a flow diagram showing a designation interpretation process based on the designated position travel speed;

[0152] FIGS. 136A-136D show an operational example that is interpreted as a page-turning using the designated position travel speed;

[0153] FIGS. 137A-137G show the corresponding data samples that are interpreted as the page-turning using the designated position travel speed;

[0154]FIG. 138 is a flow diagram showing an algorithm that uses a contact pressure at a designated position as the designated information other than the designated path;

[0155]FIG. 139 is a flow diagram showing a designation interpretation process based on the designated position contact pressure;

[0156] FIGS. 140A-140D show an operational example that is interpreted as a screen shifting operation in response to the designated position contact pressure;

[0157] FIGS. 141A-141H show the corresponding data samples that are interpreted as the screen shifting operation in response to the designated position contract pressure;

[0158]FIG. 142 is a flow diagram showing an algorithm that uses the distances of travel of a plurality of designated positions;

[0159]FIG. 143 is a flow diagram showing a designation interpretation process based on the distances of travel of the plurality of designated positions;

[0160] FIGS. 144A-144D show an operational example that is interpreted as a page-turning operation in response to the distances of travel of the plurality of designated positions;

[0161] FIGS. 145A-145G show the corresponding data samples that are interpreted as the page-turning operation in response to the distances of travel of the plurality of designated positions;

[0162]FIG. 146 is a flow diagram showing an algorithm that uses stationary times of a plurality of designated positions;

[0163]FIGS. 147A and 147B show an operational example that is interpreted as an area designating operation;

[0164] FIGS. 148A-148D show the corresponding data samples that are interpreted as the area designating operation;

[0165]FIGS. 149A and 149B show an operational example that is interpreted as an expansion operation to be effected on a designated area; and

[0166] FIGS. 150A-150D show the corresponding data samples that are interpreted as the expansion operation to be effected on the designated area.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0167] Preferred embodiments of the present invention are discussed, referring to the drawings.

[0168]FIG. 1 is a block diagram showing the hardware structure of an information processing apparatus of one embodiment of the present invention.

[0169] As shown, for example, an input module 1 is a touch panel for receiving information by a position designation. A CPU 2, performing computation and logical determination for a variety of processes, controls elements connected to a bus 6. An output module 3 is a display for displaying information thereon, a printer for printing out information, or a modem for transmitting information.

[0170] A program memory 4 stores programs which are executed by the CPU 2, as will be discussed in detail with reference to flow diagrams. The program memory 4 may be a ROM (Read-Only Memory) or a RAM (Random Access Memory) into which programs are transferred from an external storage device.

[0171] A data memory 5 stores data that is created in the course of each process, and knowledge base, as will be discussed later. The data memory 5 may be a RAM. The knowledge base may be preloaded from a nonvolatile external storage device, or may be referenced in time of need.

[0172] The bus 6 transfers an address signal designating an element that is to be controlled by the CPU 2, a control signal for controlling each element, and data to be exchanged the elements.

[0173] First Embodiment

[0174] FIGS. 2A-2C show an example of position inputting using a finger on a touch panel. As shown, the information processing apparatus knows an input by acquiring the paths extending between the start points and the end points of two paths A and B at which fingers touch.

[0175] In an example 1 of travel of designated position points in a parallel direction, the distance between the two points remain unchanged, and the resulting paths are parallel. This example may be used to translate an object.

[0176] In an example 2 of travel of designated position points in an inward direction, the two points approach each other in the paths thereof. This example may be used to contract or minimize an object.

[0177] In an example 3 of travel of designated position points, the two points move away from each other in the paths thereof. This example may be used to expand or maximize an object.

[0178]FIG. 3 shows an example of position inputting using a finger on an image pickup device. Instead of directly touching the touch panel with the fingers, a user moves the fingers as represented by signs 303 and 304 within a effective field 302 of a camera 301. The apparatus recognizes a pointed location (at the finger tip), thereby detecting a designated position point.

[0179]FIG. 4 is a flow diagram showing a process of using a path of a designated position point. As shown, an input is sensed in step S401. When the end of the input remains undetected, the algorithm proceeds to step S403. A path detection process is thus initiated. In succession, in step S404, a process in response to a detected path as input information is initiated.

[0180]FIG. 5 is a flow diagram showing the path detection process performed in step S403. In step S501, a designated position detection process is executed to acquire coordinate data of current designated position points. In step S502, a combination determination process is performed to determine combinations of current designated position points and immediately preceding designated position points respectively closest thereto. In step S503, a designated position storage process is executed to store the current designated position point in an optimum designated position table (i.e., the same table in which the immediately preceding position closest thereto is stored).

[0181]FIG. 6 is a flow diagram showing a combination determination process in step S502. As shown, step S601 performs a process for determining a distance between one of the current designated position points and each of the immediately preceding designated position points. In step S602, a combination of the current designated position point and the immediately preceding designated position point closest thereto is determined. When such a combination is found in step S603, the algorithm proceeds to step S604. The current designated position point is then added to the table that stores the immediately preceding designated position point to be combined therewith. This series of steps is repeated until no further combination is found in step S603.

[0182] FIGS. 7A-7C show stored current designated position data that is stored in the path detection process. As shown in a graph 701, the XY coordinates of a point At₁ are (3,3) at time t₁, and the XY coordinates of a point At₅ are (7,5) at time t₅. Tables 702 and 703 respectively store the coordinate data of the points A and B taken at time points from t₁ to t₅.

[0183]FIGS. 8A and 8B show current designated position data that is acquired in the path detection process. As shown in a graph 801, there are a plurality of designated position points at time t₆: a point a having XY coordinates (8,6) and a point b having XY coordinates (8,8). A table 802 stores the position data currently acquired (at time t₆).

[0184] FIGS. 9A-9D show a flow of data that is used in the detection of paths of a plurality of designated position points. As shown, a table 901 stores the point a (8,6) and the point b (8,8) as the current designated data. Referencing the current designated position data, a distance is calculated from each of the current designated position points to each of the immediately preceding designated position points. For example, the apparatus determines a distance of 1.414 from the point a to the immediately preceding designated position point At₅ and a distance of 4.123 from the point a to the immediately preceding designated position point Bt₅.

[0185] As a result, the point a is stored in a table 903 which stores the immediately preceding designated position point At₅ closest thereto. Similarly, the point b is stored in a table 904 which stores the immediately preceding designated position point Bt₅ closest thereto.

[0186]FIG. 10 is a flow diagram showing a path detection process using the size of a designated area. In the above process, the path is determined based on the assumption that each of the current designated position points is linked to one of the immediately preceding designated position points closest thereto. Here, a path is determined based on the assumption that each of the current designated position points is linked to one of the plurality of preceding designated position points having a designated area (for example, a contact area by a finger on a touch panel) closest in size to the area of the current designated position point.

[0187] As shown, a designated area detection process is initiated to acquire the current designated area in step S1001. In step S1002, a combination determination process is initiated to determine a combination of the current designated area and the immediately preceding designated area closest thereto based on a difference between the current designated area and the immediately preceding designated area. In step S1003, a designated-area storage process is initiated in step S1003 to store the current designated area in an optimum table (i.e., the table that stores the immediately preceding designated area closest to the current designated area).

[0188]FIG. 11 is a flow diagram showing the combination determination process using the size of the designated area in step S1002. As shown, in step S1101, a process is initiated to determine a difference between the current designated area and the immediately preceding designated area. In succession, step S1102 determines a combination of the current designated area and the immediately preceding designated area closest in size thereto. The algorithm proceeds to step S1104 when any combination is found in step S1103. The current designated position point and the area thereof are added to the table of the immediately preceding designated position point and the area thereof respectively closest in position and size thereto. This series of process steps is repeated until no further combinations are found in the step S1103.

[0189]FIGS. 12A and 12B show an area of an acquired current designated position point. In a graph 1201, the current designated position is the point a(8,6). An enlarged view 1202 shows the touch state of the touch panel when the point a is pressed. The area of the designated position point is thus determined.

[0190] FIGS. 13A-13D show the data of the area of the stored designated positions. As shown, in a graph 1301 at time t₁, the XY coordinates of the designated position point At₁ are (3,3) and the XY coordinates of the designated position point Bt₁ are (12, 14). At time t₅, the XY coordinates of the designated position point At₅ are (7,5) and the XY coordinates of the designated position point Bt₅ is (8,8). There also exist a current designated area 1 containing the point a(8,6) and a current designated area 2 containing the point b(8,8) at time t₆.

[0191] In a table 1302, the area A of the point a is 12.5 at time t1, and the area data of the point a at subsequent time points between time t₁ and time t₅ are also stored in the table 1302. Similarly, the data of the area B of the point b at each time point is stored in a table 1303. A table 1304 stores an area of 11.5 containing the point a and an area of 20.0 containing the point b as the acquired designated data at current time t₆.

[0192] FIGS. 14A-14D show a flow of data that is used in a path acquisition process based on the size of the designated area. As shown, a table 1401 lists, as the current designated area data, an area of 11.5 containing the point a(8,6) and an area of 20.0 containing the point b(8,8). Referencing the current designated area data, the apparatus acquires a difference between the current designated area data and the immediately preceding area data and stores the difference in a table 1402. With respect to the designated area 11.5 containing the point a, the apparatus thus acquires a difference of 0.5 from the immediately preceding area A and a difference of 9.0 from the immediately preceding area B.

[0193] The designated area data 11.5 containing the point a is thus stored in a table 1403 that stores the immediately preceding area A that results in the minimum difference. Similarly, the designated area data containing the point b is stored in a table 1404 that stores the immediately preceding designated area B.

[0194] Second Embodiment

[0195] A second embodiment of the present invention is discussed. In the second embodiment, a process for interpreting an operation to perform is based on a combination of travel paths of at least two designated position points.

[0196]FIG. 15 is a flow diagram showing an operational procedure using the paths of a plurality of designated position points. An input is detected in step S1501. The algorithm proceeds to step S1502. When the end of the input remains undetected in step S1502, the algorithm proceeds to step S1503, thereby initiating a travel path detection process. In step S1504, a designation interpretation process is performed, and in step S1505, a process in response to the designation is initiated.

[0197]FIG. 16 is a flow diagram showing a process flow of the designation interpretation process in the step S1504. In step S1601, a designated position-to-position distance measurement process is initiated to measure a distance between current designated position points. In succession, step S1602 performs a process for acquiring a change in the designated position-to-position distance to acquire the distance change. In step S1603, the designation interpretation process based on the distance change is performed to interpret an operation to perform based on the acquired distance change.

[0198]FIG. 17 is a flow diagram showing a process in the step S1602 for acquiring the change in the distance between the designated position points. In step S1701, a distance between the designated position points at the start of a travel is measured. In step S1702, a distance between the designated position points at the end of the travel is measured. In succession, step S1703 determines a difference between the distance between the designated position points at the start of the travel and the distance between the designated position points at the end of the travel.

[0199]FIG. 18 is a flow diagram showing a designation interpretation process in the step S1603 based on the change in the distance between the designated position points. When the amount of change in the distance is smaller than zero in step S1801, the designation is interpreted as a contraction operation (in step S1802). When the amount of change is greater than zero, the designation is interpreted as an expansion operation (in step S1803). When the amount of change is equal to zero, the designation is interpreted as an operation other than the contraction and expansion operations (in step S1804).

[0200]FIG. 19 is a flow diagram showing another designation interpretation process based on the change in the distance between the designated position points. In step S1901, an operational magnification is acquired from the distance change obtained in the process of acquiring the distance change between the designated position points. In step S1902, the rate of change is acquired, and in step S1903, an effective magnification results from the operational magnification and rate of change data in accordance with the following equation.

Effective magnification=100−(100-operational magnification×) x rate of change α

[0201]FIGS. 20A and 20B show an operational example that is interpreted as a contraction operation. As shown, designated position points A and B at the start time t₁ of a travel are respectively shifted to designated position points A′ and B′ at the end time t₅ of the travel. This input is interpreted as a contraction operation.

[0202]FIGS. 21A and 21B show the corresponding data samples that are interpreted as the contraction operation. In a graph 2101, the XY coordinates of the designated position points are At₁(3,3) and Bt₁(12,10) at the start time t₁ and At₅(7,5) and Bt₅(8,6) at the end time t₅ of the travel. Referring to a table 2102, the distance between the designated points is 15.00 at the start time t₁, and is 1.118 at the end time t₅. The mount of change in the distance between the designated position points is −13.882 from the start time t₁ to the end time t₅. The magnification of the distance change between the designated position points from the start time t₁ to the end time t₅ is 7%.

[0203]FIGS. 22A and 22B show an operational example that is interpreted as an expansion operation. As shown, designated position points A and B at the start time t₁ of a travel are respectively shifted to designated position points A′ and B′ at the end time t₅ of the travel. This input is interpreted as an expansion operation.

[0204]FIGS. 23A and 23B show the corresponding data samples that are interpreted as the expansion operation. In a graph 2301, the XY coordinates of the designated position points are At₁(7,5) and Bt₁(8,6) at the start time t₁ and At₅(3,3) and Bt₅(12,10) at the end time t₅ of the travel. Referring to a table 2302, the distance between the designated points at the start time t₁ is 1.118, and 11.402 at the end time t₅. The mount of change in the distance between the designated position points is +13.586 from the start time t₁, to the end time t₅. The magnification of the distance change between the designated position points from the start time t₁, to the end time t₅ is 1020%.

[0205] Third Embodiment

[0206] A third embodiment of the present invention is now discussed. The third embodiment accounts for a change in an angle made between a reference line and a line that connects two designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions. The angle made between the reference line and the line that connects the two designated positions is hereinafter occasionally referred to as the designated position angle.

[0207]FIG. 24 is a flow diagram showing a designation interpretation process using a change in the angle of designated positions. In step S2401, a process for measuring the designated position angle is initiated. At each time point, the designated position angle is measured. The algorithm proceeds to step S2402. An acquisition process of acquiring a change in the designated position angle is performed. In step S2403, a designation interpretation process is initiated to interpret an operation to perform based on the acquired angle change.

[0208]FIG. 25 is a flow diagram showing the process for acquiring the change in the angle of the designated position. In step S2501, an angle of a line connecting the designated positions is measured at the start of a travel, and in step S2502, an angle of a line connecting the designated positions is measured at the end of the travel. The algorithm proceeds to step S2503. A difference between the angles of the line connecting the designated position points at the start of the travel and the line connecting the designated position points at the end of the travel is acquired.

[0209]FIG. 26 is a flow diagram showing a designation interpretation process based on the angle change. When the amount of change is greater than zero degree in step S2601, the designation is interpreted as a counterclockwise rotation operation (in step S2602). When the amount of change is smaller than zero degree in the step S2601, the designation is interpreted as a clockwise rotation operation (in step S2603). When the amount of change equals zero degree, the designation is interpreted as an operation other than rotation operations (in step S2604).

[0210]FIGS. 27A and 27B show an operational example that is interpreted as a clockwise rotation operation. As shown, designated position points A and B at the start time t₁, of the travel are respectively shifted to designated position points A′ and B′ at the end time t₅ of the travel. This input is interpreted as a clockwise rotation operation.

[0211]FIGS. 28A and 28B show the corresponding data samples that are interpreted as the clockwise rotation operation. In a graph 2801, the angle of the designated position points A and B is 60 degrees with respect to the X axis at the start time t₁ of the travel and is 26 degrees with respect to the X axis at the end time t₅ of the travel. As listed in a table 2802, the amount of change in the angle from the start time t₁ of the travel to the end time t₅ of the travel is −34°.

[0212]FIGS. 29A and 29B show an operational example that is interpreted as a counterclockwise rotation operation. As shown, designated position points A and B at the start time t₁ of the travel are respectively shifted to designated position points A′ and B′ at the end time t₅ of the travel. This input is interpreted as a counterclockwise rotation operation.

[0213]FIGS. 30A and 30B show the corresponding data samples that are interpreted as the counterclockwise rotation operation. In a graph 3001, the angle of the designated position point points A and B is 60 degrees with respect to the X axis at the start time t₁ of the travel and is 87 degrees with respect to the X axis at the end time t₅ of the travel. As listed in a table 3002, the amount of change in the angle from the start time t₁ of the travel to the end time t₅ of the travel is +27°.

[0214] Fourth Embodiment

[0215] A fourth embodiment of the present invention is now discussed. The fourth embodiment accounts for a change in a relationship between a designated fixed position and a designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated position points.

[0216]FIG. 31 is a flow diagram showing a designation interpretation process that uses a relationship between a designated fixed position and a designated moving position. In step S3101, a designated fixed position detection process is initiated to detect a designated fixed position. In succession, step S3102 initiates a designation interpretation process in response to the designated fixed position to interpret an operation to perform.

[0217]FIG. 32 is a flow diagram showing the designated fixed position detection process. When the designated fixed position detection process is initiated, a designated position at time t is detected in step S3201. When position data is present in step S3202, the algorithm proceeds to step S3203 to compare the current designated position with an initial value of the designated position. When both are unmatched, the designated position is determined to be as being shifted in step S3204. When the designate position at time t matches the initial value thereof, the algorithm proceeds to step S3205 to advance time t, and then the above series of steps starts again with the step S3201. When no position data is available in the step S3202, the designated position is determined to be fixed, and the designated fixed position is then detected.

[0218]FIG. 33 is a flow diagram showing a designation interpretation process based on the direction of travel. In step S3301, a process is initiated to determine the travel direction of the designated position. In step S3302, an operation to perform is interpreted based on the determined travel direction of the designated position.

[0219] When the travel direction is upward, the algorithm proceeds to step S3303, thereby interpreting the designation as a next-item operation. Besides the next-item operation, the designation may be interpreted as one of a next-page operation, a next-screen operation, a last-line operation, an upward shifting operation, an expansion operation in a vertical direction only, and a contraction operation in a vertical direction only. When the travel direction is downward, the algorithm proceeds to step S3304, thereby interpreting the designation as one of a preceding-item operation. Besides the preceding-item operation, the designation may be interpreted as a preceding-page operation, a preceding-screen operation, a first-line operation, a downward shifting operation, an expansion operation in a vertical direction only, and a contraction operation in a vertical direction only.

[0220] When the travel direction is leftward, the algorithm proceeds to step S3305, thereby interpreting the designation as a next-item operation. Besides the next-item operation, the designation may be interpreted as one of a next-page operation, a next-screen operation, a last-line operation, a leftward screen shifting operation, an expansion operation in a lateral direction only, and a contraction operation in a lateral direction only. When the travel direction is rightward, the algorithm proceeds to step S3306, thereby interpreting the designation as a preceding-item operation. Besides the preceding-item operation, the designation may be interpreted as one of a preceding-page operation, a preceding-screen operation, a first-line operation, a rightward screen shifting operation, an expansion operation in a lateral direction only, and a contraction operation in a lateral direction only.

[0221]FIG. 34 is a flow diagram showing the process of determining the direction of travel of the designated position point in step S3301. In step S3401, the distance of travel of the designated position point is acquired in step S3401. In step S3402, the direction of travel is determined from the current coordinates of the designated moving position. In this case, the arctangent of the current coordinates (X,Y) of the designated moving position is determined and the unit of measure is converted from radian to degree.

[0222]FIG. 35 illustrates the interpretation of angles used in the designated position travel direction determination process. As shown in a diagram 3501, the angle range of 360° is divided into two zones with respect to the X axis: one zone ranges from 0° to 180° in the positive Y axis area and the other ranges from −1° to −179° in the negative Y axis area.

[0223] An angle segment having a range of ±35° (from −35° to 35°) with respect to 0° is interpreted as a rightward direction range. An angle segment having a range of ±35° (from 55° to 125°) with respect to 90° is interpreted as an upward direction range. An angle segment having a range of 35° (from 145° to 180° and from −179° to −145°) with respect to 180° is interpreted as a leftward direction range. An angle segment having a range of ±35° (from −55° to −125°) with respect to −90° is interpreted as a downward direction range. Angle ranges of ±10° respectively with respect to 45°, 135°, −135°, and −45° are used for other operations.

[0224]FIGS. 36A and 36B show an operational example that is interpreted as a leftward shifting operation. When the designated position point A is fixed with the designated position point B being moved from Bt₁ to Bt₅, the input is designated as a leftward shifting operation.

[0225] FIGS. 37A-37D show the corresponding data samples that are interpreted as the leftward shifting operation. As shown in a graph 3701, the designated fixed position has the coordinates thereof at point A(3,3). The designated moving position has the coordinates thereof at point Bt₁(6,3) at travel start time t₁ and at point Bt₅(4,2) at travel end time t₅. Tables 3702 list position data of the designated fixed position point A and the designated moving position point B from time t₁ to time t₅. A table 3703 lists designated position travel data. The travel distance of the designated fixed position point A at the travel end time t₅ is zero. The designated moving position point B has a distance of travel of 2.236 and a direction of travel of −135.43°.

[0226]FIGS. 38A and 38B show an operational example that is interpreted as an upward shifting operation. As shown, the designated position point A is fixed while the designated position point B is being moved from Bt₁, to Bt₅. This input is interpreted as an upward shifting operation.

[0227] FIGS. 39A-39D show the corresponding data samples that are interpreted as the upward shifting operation. As shown in a graph 3901, the designated fixed position has the coordinates thereof at point A(6,6). The designated moving position has the coordinates thereof at point Bt₁(5,1) at travel start time t₁and at point Bt₅(7,4) at travel end time t₅. Tables 3902 list position data of the designated fixed position point A and the designated moving position point B from time t₁ to time t₅. A table 3903 lists designated position travel data. The travel distance of the designated fixed position point A at the travel end time t₅ is zero. The designated moving position point B has a distance of travel of 3.603 and a direction of travel of −56.31°.

[0228]FIGS. 40A and 40B show an operational example that is interpreted as a downward shifting operation. As shown, the designated position point A is fixed while the designated position point B is being moved from Bt₁, to Bt₅. This input is interpreted as a downward shifting operation.

[0229] FIGS. 41A-41D show the corresponding data samples that are interpreted as the downward shifting operation. As shown in a graph 4101, the designated fixed position A has the coordinates thereof at point A(3,3). The designated moving position B has the coordinates thereof at point Bt₁(5,8) at travel start time t₁ and at point Bt₅(5,5) at travel end time t₅. Tables 4102 list position data of the designated fixed position point A and the designated moving position point B from time t₁to time t₅. A table 4103 lists designated position travel data. The travel distance of the designated fixed position point A at the travel end time t₅ is zero. The designated moving position point B has a distance of travel of 3.000 and a direction of travel of −90°.

[0230]FIGS. 42A and 42B show an operational example that are interpreted as a rightward shifting operation. As shown, the designated position point A is fixed while the designated position point B is being moved from Bt₁, as shown FIG. 42A to Bt₅ as shown in FIG. 42B. This input is interpreted as a rightward shifting operation.

[0231] FIGS. 43A-43D show the corresponding data samples that are interpreted as the rightward shifting operation. As shown in a graph 4301, the designated fixed position A has the coordinates thereof at point A(6,6). The designated moving position B has the coordinates thereof at point Bt₁(2,6) at travel start time t₁ and at point Bt₅(5,5) at travel end time t₅. Tables 4302 list position data of the designated fixed position point A and the designated moving position point B from time t₁to time t₅. A table 4303 lists designated position travel data. The travel distance of the designated fixed position point A at the travel end time t₅ is zero. The designated moving position point B has a distance of travel of 3.162 and a direction of travel of −18.43°.

[0232] Fifth Embodiment

[0233] A fifth embodiment of the present invention is now discussed. The fifth embodiment accounts for a change in a distance between a designated fixed position and a designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0234]FIG. 44 is a flow diagram showing a designation interpretation process that uses the change in the distance between the designated fixed position and the designated moving position. A process is initiated to measure the distance between the designated fixed position and the designated moving position in step S4401. In step S4402, a process of acquiring a change in the designated position-to-position distance is performed to acquire the distance change. In step S4403, the designation interpretation process is initiated based on the acquired distance change, thereby interpreting what operation to perform.

[0235]FIG. 45 is a flow diagram showing, in step S4403, the designation interpretation process that uses the change in the distance between the designated positions. The amount of change is determined in step S4501. When the amount of change is found to decrease, the input is interpreted as a contraction operation (in step S4502). When the amount of change is found to increase, the input is interpreted as an expansion operation (in step S4503).

[0236]FIGS. 46A and 46B show an operational example that is interpreted as a contraction operation. As shown, the designated position point A is fixed while the designated position point B is being moved from Bt₁ to Bt₅ toward the designated fixed position A. This input is interpreted as a contraction operation.

[0237] FIGS. 47A-47D show the corresponding data samples that are interpreted as the contraction operation. As shown in a graph 4701, the designated fixed position A has the coordinates thereof at point A(3,3). The designated moving position B has the coordinates thereof at point Bt₁,(6,3) at travel start time t₁ and at point Bt₅(4,2) at travel end time t₅. Tables 4702 list position data of the designated fixed position point A and the designated moving position point B from time t₁ to time t₅. A table 4703 lists data of a change in the distance between the designated positions. The position-to-position distance between the points A and B is 3.000 at the travel start time t₁ and is 1.414 at the travel end time t₅. The magnification of the position-to-position distance between the points A and B is 47% from time t₁ to time t₅.

[0238]FIGS. 48A and 48B show an operational example that is interpreted as an expansion operation. As shown, the designated position point A is fixed while the designated position point B is being moved from Bt₁ to Bt₅ in a direction away from the designated fixed position A. This input is interpreted as an expansion operation.

[0239] FIGS. 49A-49D show the corresponding data samples that are interpreted as the contraction operation. As shown in a graph 4901, the designated fixed position A has the coordinates thereof at point A(3,3). The designated moving position B has the coordinates thereof at point Bt₁(4,2) at travel start time t₁ and at point Bt₅(6,3) at travel end time t₅. Tables 4902 list position data of the designated fixed position point A and the designated moving position point B from time t₁ to time t₅. A table 4903 lists data of a change in the distance between the designated positions. The position-to-position distance between the points A and B is 1.414 at the travel start time t₁ and 3.000 at the travel end time t₅. The magnification of the position-to-position distance change between the points A and B is 212% from time t₁ to time t₅.

[0240]FIGS. 50A and 50B show an operational example that is interpreted as a contraction operation centered on a designated fixed position. As shown, the designated position A is fixed. As shown, a designated fixed position A remains stationary, and designated moving position points B and C are respectively moved from Bt₁ and Ct₁ to Bt₅ and Ct₅. This input is interpreted as a contraction operation toward the designated fixed position point A.

[0241] FIGS. 51A-51F show the corresponding data samples that is interpreted as the contraction operation centered on the designated fixed position. As shown in a graph 5101, a designated fixed position A has the coordinates thereof at point A(3,3). A designated moving position 1 as the point B has the coordinates thereof at point Bt₁(4,8) at travel start time t₁ and at point Bt₅(5,5) at travel end time t₅. A designated moving position 2 as the point C has the coordinates thereof at point Ct₁(2,2) at the travel start time t₁ and at point Ct₅(4,3.5) at the travel end time t₅. Tables 5102 list position data of the designated fixed position point A, the designated moving position 1 (the point B) and the designated moving position 2 (the point C) from time t₁ to time t₅.

[0242] Tables 5103 list data of the change in the distance between the designated positions. In data 1 of the change in the designated position-to-position distance, the distance between the points A and B is 5.099 at the travel start time t₁ and is 2.828 at the travel end time t₅. The magnification resulting from the position-to-position distance change between the points A and B is 55% from time t₁ to time t₅. In data 2 of the change in the designated position-to-position distance, the distance between the points A and C is 1.414 at the travel start time t₁ and is 1.118 at the travel end time t₅. The magnification resulting from the position-to-position distance change between the points A and C is 79% from time t₁ to time t₅.

[0243] Sixth Embodiment

[0244] A sixth embodiment of the present invention is now discussed. The sixth embodiment accounts for the presence of a designated fixed position and a change in a distance between designated moving positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0245]FIG. 52 is a flow diagram showing an algorithm that uses a distance between designated moving positions. In succession to the initiation of a designated fixed-position based designation interpretation process, a process of acquiring the distance between the designated moving positions is initiated in step S5201. In step S5202, a process of acquiring the change in the distance between the designated moving positions is initiated, thereby acquiring the change in the distance. In step S5203, a designation interpretation process based on the distance change between the designated moving positions is initiated, thus interpreting the input based on the amount of change in the distance between the designated moving positions.

[0246]FIG. 53 is a flow diagram showing the designation interpretation process based on the change in the distance between the designated moving positions. When there is a designated fixed position in step S5301, the algorithm proceeds to step S5302. When the amount of change is smaller than zero, the input is interpreted as a contraction operation with respect to the designated fixed position in step S5303. When the amount of change is greater than zero, the input is interpreted as an expansion operation with respect to the designated fixed position in step S5304. When the amount of change equals zero, the input is interpreted as an operation other than the contraction and expansion operations in step 5305. When the presence of the designated fixed position is not verified in the step S5301, the algorithm proceeds to step S5306 and the input is thus interpreted as an operation effective on the entire screen.

[0247]FIGS. 54A and 54B show an operational example that is interpreted as a contraction operation. A designated position point A is fixed while two designated moving positions Bt₁ and Ct₁ respectively move to Bt₅ and Ct₅ toward the designated fixed position A. The input is thus interpreted as a contraction operation centered on the designated fixed position A in accordance with the amount of change in the distance between the designated moving positions.

[0248] FIGS. 55A-55E show the corresponding data samples that are interpreted as the contraction operation. In a graph 5501, the designated fixed position has the coordinates thereof at point A(3,3). The designated moving position B has the coordinates thereof at point Bt₁(4,8) at travel start time t₁ and at point Bt₅(5,5) at travel end time t₅. The designated moving position point C has the coordinates thereof at point Ct₁(3,2) at the travel start time t₁ and at point Ct₅(4,2.8) at the travel end time t₅.

[0249] Tables 5502 list position data of the designated fixed position point A, the designated moving position point B, and the designated moving position point C from time t₁ to time t₅. A table 5503 lists data of the change in the distance between the designated moving positions. In the data of the distance change between the designated moving positions, the distance between the designated position points B and C is 6.083 at the travel start time t₁ and is 2.417 at the travel end time t₅. The magnification resulting from the distance change between the designated position points B and C is 40% from time t₁ to time t₅.

[0250]FIGS. 56A and 56B show an operational example that is interpreted as an expansion operation centered on the designated fixed position. A designated position point A is fixed while two designated moving positions Bt₁ and Ct₁ respectively move to Bt₅ and Ct₅ in a direction away from the designated fixed position A. The input is thus interpreted as an expansion operation centered on the designated fixed position A in accordance with the amount of change in the distance between the designated moving positions.

[0251] FIGS. 57A-57E show the corresponding data samples that are interpreted as the expansion operation centered on the designated fixed position. In a graph 5701, the designated fixed position has the coordinates thereof at point A(3,3). The designated moving position 1 (the point B) has the coordinates thereof at point Bt₁(5,5) at travel start time t₁and at point Bt₅(4,8) at travel end time t₅. The designated moving position 2 (the point C) has the coordinates thereof at point Ct₁(4,2.8) at the travel start time t₁ and at point Ct₅(2,2) at the travel end time t₅.

[0252] Tables 5702 list position data of the designated fixed position point A, the designated moving position 1 (the point B), and the designated moving position 2 (the point C) from time t₁ to time t₅. A table 5703 lists data of the change in the distance between the designated moving positions. In the data 1 of the distance change between the designated moving positions, the distance between the designated position points B and C is 2.417 at the travel start time t₁ and is 6.325 at the travel end time t₅. The magnification resulting from the distance change between the designated position points B and C is 262% from time t₁ to time t₅.

[0253]FIGS. 58A and 58B show an operational example that are interpreted as an operation for moving a plurality of positions with respect to a designated fixed position. As shown, a designated position point A is fixed. A designated moving position 1, a designated moving position 2 and a designated moving position 3, which are respectively positioned at a point Bt₁, a point Ct₁, and a point Dt₁ as shown in FIG. 58A at travel start time t₁, are respectively moved to a point Bt₅, a point Ct₅, and a point Dt₅ as shown in FIG. 58B toward the designated fixed position A at travel end time t₅. The input is thus interpreted as an operation for moving the plurality of designated position points toward the designated fixed position A according to the amount of change in the distance between the designated moving positions.

[0254] FIGS. 59A-59H show the corresponding data samples that are interpreted as the operation for moving the plurality of positions. In a graph 5901, the designated fixed position is placed at coordinates A(3,3). The designated moving position 1 (the point B) is placed at coordinates Bt₁(5,5) at the travel start time t₁ and at coordinates Bt₅(4,8) at the travel end time t₅. The designated moving position 2 (the point C) is placed at coordinates Ct₁(4,3.5) at the travel start time t₁ and at Ct₅(2,2) at the travel end time t₅. The designated moving position 3 (the point D) is placed at coordinates Dt₁(5.5,4.5) at the travel start time t₁and at coordinates Dt₅(6,9) at the travel end time t₅.

[0255] Tables 5902 list position data of the designated fixed position A, and the three designated moving positions B, C, and D. Tables 5903 list changes in the distances between the designated moving positions. In data 1 of the distance change, the distance between the designated position points B and C is 1.803 at the travel start time t₁, and is 6.325 at the travel end time t₅. The magnification resulting from the distance change between the designated positions is 352% from time t₁ to time t₅. In data 2 of the distance change, the distance between the designated position points B and D is 0.707 at the travel start time t₁, and is 2.236 at the travel end time t₅. The magnification resulting from the distance change between the designated position points is 316% from time t₁ to time t₅. In data 2 of the distance change, the distance between the designated position points C and D is 1.803 at the travel start time t₁, and is 8.062 at the travel end time t₅. The magnification resulting from the distance change between the designated position points is 447% from time t₁ to time t₅.

[0256] Seventh Embodiment

[0257] A seventh embodiment of the present invention is now discussed. The seventh embodiment accounts for a change in an angle made between a horizontal direction and a line that connects a designated fixed position and a designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated position points. The angle is hereinafter referred to as a fixed-to-moving position angle.

[0258]FIG. 60 is a flow diagram of an algorithm that uses a change in the angle of the designated fixed and moving positions. In step S6001, a process is performed to measure the fixed-to-moving position angle. In step S6002, a process is performed to acquire a change in the fixed-to-moving position angle. In step S6003, a designation interpretation process is performed to interpret the input based on the acquired angle change.

[0259]FIG. 61 is a flow diagram showing the designation interpretation process based on the change in the fixed-to-moving position angle. When there is no designated fixed position in step S6101, the algorithm proceeds to step S6106. The input is interpreted as an operation for the entire screen. When any designated fixed position is found in the step S6106, the algorithm proceeds to step 6102. When the amount of change is smaller than zero degree, the algorithm proceeds to step S6104, and the input is interpreted as a clockwise rotation operation about the designated fixed position. When the amount of change is greater than zero degree, the algorithm proceeds to step S6103, and the input is interpreted as a counterclockwise rotation operation about the designated fixed position. When the amount of change equals zero degree, the algorithm proceeds to step S6105, and the input is interpreted as an operation other than rotation operations, or a modified operation in a rotational direction with the designated fixed position stationary.

[0260]FIGS. 62A and 62B show an operational example that is interpreted as a clockwise rotation operation. As shown, a designated position point A is fixed while a designated moving position B moves from a point Bt₁ at travel start time t₁ to a point Bt₅ at travel end time t₅. This input is interpreted as a clockwise rotation operation.

[0261] FIGS. 63A-63D show the corresponding data samples that are interpreted as the clockwise rotation operation. In a graph 6301, the angle of the line connecting the designated fixed position A and the designated moving position B with respect to the horizontal line is 71.57° at the travel start time t₁ and is 18.43 at the travel end time t₅. Tables 6302A and 6302B list position data of the designated fixed position A and the designated moving position B. A table 6303 lists angle change data of the designated position points, in which the amount of change in the fixed-to-moving position angle from the travel start time t₁ to the travel end time t₅ is −53.13°.

[0262]FIGS. 64A and 64B show an operational example that is interpreted as a counterclockwise rotation operation. As shown, a designated position point A is fixed while a designated moving position B moves from a point Bt₁, at travel start time t₁ to a point Bt₅ at travel end time t₅. This input is interpreted as a counterclockwise rotation operation.

[0263] FIGS. 65A-65D show the corresponding data samples that are interpreted as the counterclockwise rotation operation. In a graph 6501, the angle of the line connecting the designated fixed position A and the designated moving position B with respect to the horizontal line is 71.57° at the travel start time t₁ and is 108.43° at the travel end time t₅. Tables 6502A and 6502B list position data of the designated fixed position A and the designated moving position B. A table 6503 lists angle change data of the designated position points, in which the amount of change in the fixed-to-moving position angle from the travel start time t₁ to the travel end time t₅ is +36.87°.

[0264] Eighth Embodiment

[0265] An eight embodiment of the present invention is now discussed. The eighth embodiment accounts for a change in an angle made between a horizontal direction and a line that connects two designated moving positions when an operation to perform is interpreted from a combination of travel paths of at least two designated position points. The angle is hereinafter referred to as a moving-to-moving position angle.

[0266]FIG. 66 is a flow diagram of an algorithm that uses a change in the moving-to-moving position angle. In step S6601, a process is performed to measure the moving-to-moving position angle. In step S6602, a process is performed to acquire a change in the moving-to-moving position angle. In step S6603, a designation interpretation process is performed to interpret the input based on the acquired angle change.

[0267]FIG. 67 is a flow diagram of the designation interpretation process based on the change in the moving-to-moving position angle. When no designated fixed position is found in step S6701, the algorithm proceeds to step S6706. The input is then interpreted as an operation effective on the entire screen. When a designated fixed position is found in the step S6701, the amount of change is checked in step S6702. When the amount of change is smaller than zero degree, the algorithm proceeds to step S6704, and the input is interpreted as a clockwise rotation operation about the designated fixed position. When the amount of change is greater than zero degree, the algorithm proceeds to step S6703, and the input is interpreted as a counterclockwise rotation operation about the designated fixed position. When the amount of change equals zero degree, the algorithm proceeds to step S6705, and the input is interpreted as an operation other than rotation operations. Otherwise, the input is interpreted as a modified operation in a rotation direction about the center of gravity of the designated moving positions with the designated fixed position stationary.

[0268]FIGS. 68A and 68B show an operational example that is interpreted as the clockwise rotation operation. As shown, a designated position point A is fixed while designated moving positions 1 and 2 respectively move from a point Bt₁, and a point Ct₁ to a point Bt₅ and a point Ct₅. This input is interpreted as a clockwise rotation operation.

[0269] FIGS. 69A-69E show the corresponding data samples that are interpreted as the clockwise rotation operation. In a graph 6901, the designated fixed position A has coordinates A(3,3). The designated moving position B is placed at coordinates Bt₁(4,6) at the travel start time t₁ and placed at coordinates Bt₅(6,4) at the travel end time t₅. The designated moving position C is placed at coordinates Ct₁(2,1) at the travel start time t₁ and placed at coordinates Ct₅(1,2) at the travel end time t₅. Tables 6902 list position data of the designated fixed position A, the designated moving position 1 (the point B), and the designated moving position 2 (the point C) from t₁ to t₅. A table 6903 lists data of angle change in the moving-to-moving position angle. In the angle change data, the moving-to-moving position angle is 68.20° at the travel start time t₁ and is 36.87° at the travel end time t₅. The amount of change in the moving-to-moving position angle is −31.33°.

[0270]FIGS. 70A and 70B show an operational example that is interpreted as a counterclockwise rotation operation. As shown, a designated position point A is fixed while designated moving positions B and C respectively move from a point Bt₁ and a point Ct₁ to a point Bt₅ and a point Ct₅. This input is interpreted as a counterclockwise rotation operation.

[0271] FIGS. 71A-71E show the corresponding data samples that are interpreted as the counterclockwise rotation operation. In a graph 7101, the designated fixed position A has coordinates A(3,3). The designated moving position B is placed at coordinates Bt₁,(4,6) at the travel start time t₁ and placed at coordinates Bt₅(2,5) at the travel end time t₁. The designated moving position C is placed at coordinates Ct₁(2,1) at the travel start time t₁ and placed at coordinates Ct₅(2.5,2) at the travel end time t₅. Tables 7102 list position data of the designated fixed position point A, the designated moving position point B, and the designated moving position point C from t₁ to t₅. A table 7103 lists data of angle change in the moving-to-moving position angle. In the angle change data, the moving-to-moving position angle is 68.20° at the travel start time t₁ and is 99.46° at the travel end time t₅. The amount of change in the moving-to-moving position angle is +31.26°.

[0272]FIGS. 72A and 72B show an operational example that is interpreted as a rotation operation about the center of gravity of three designated moving positions. As shown, a designated position point A is fixed while designated moving positions B, C, and D respectively move from a point Bt₁, a point Ct₁, and a point Dt₁ to a point Bt₅, a point Ct₅, and a point Dt₅. This input is interpreted as the rotation operation about the center of gravity.

[0273] FIGS. 73A-73H show the corresponding data samples that are interpreted as the rotation operation about the center of gravity. In a graph 7301, the designated fixed position A has coordinates A(3,3). The designated moving position B is placed at coordinates Bt₁(5,5) at the travel start time t₁ and placed at coordinates Bt₅(4,8) at the travel end time t₅. The designated moving position C is placed at coordinates Ct₁(4,3.5) at the travel start time t₁ and placed at coordinates Ct₅(2,2) at the travel end time t₅. The designated moving position D is placed at coordinates Dt₁(5.5, 4.5) at the travel start time t₁ and placed at coordinates Dt₅(6,9) at the travel end time t₅. Tables 7302 list position data of the designated fixed position point A, the designated moving position point B, the designated moving position point C, and the designated moving position point D from t₁ to t₅. Table 7303 list data of distance change between the designated moving positions. In the distance change data, the distance change between the designated moving positions B and C is 1.803 at the travel start time t₁ and is 6.325 at the travel end time t₅. The magnification resulting from the distance change therebetween is 351%. The distance change between the designated moving positions B and D is 0.707 at the travel start time t₁ and is 2.236 at the travel end time t₅. The magnification resulting from the distance change therebetween is 316%. The distance change between the designated moving positions C and D is 1.803 at the travel start time t₁ and is 8.062 at the travel end time t₅. The magnification resulting from the distance change therebetween is 447%.

[0274] Ninth Embodiment

[0275] A ninth embodiment of the present invention is now discussed. The ninth embodiment accounts for a positional relationship between a plurality of designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0276]FIG. 74 is a flow diagram showing an algorithm that uses a positional relationship between designated positions. In step S7401, a process is performed to acquire the positional relationship between the designated positions. In step S7402, a designation interpretation process is performed to interpret the input based on the acquired positional relationship between the plurality of designated positions.

[0277]FIG. 75 is a flow diagram showing, in the step S7401, the process for determining the positional relationship between designated positions. In step S7501, the angle of the designated positions is acquired. When the acquired angle is found to be within a range of from 45° to 135° with respect to 90° or a range of from −45° to −135° with respect to −90° in step S7502, the positional relationship between the designated position points is vertically upward or downward. When the acquired angle is found to be within a range of from 45° to −45° with respect to 0° or a range of from 135° to −135° with respect to 180° in step S7502, the relationship between the designated position points is laterally rightward or leftward. The interpretation of angle is already illustrated in FIG. 35.

[0278]FIG. 76 is a flow diagram showing, in the step S7402, the designation interpretation process based on the positional relationship between the designated position points. In step S7601, a process is performed to acquire an area of travel. In step S7602, the positional relationship is interpreted. When the positional relationship is vertically upward or downward, the algorithm proceeds to step S7603. The input is thus interpreted as a command for one of a cutting operation and a deleting operation. When the positional relationship is laterally rightward or leftward, the algorithm proceeds to step S7604. The input is thus interpreted as a command for a copying operation.

[0279]FIG. 77 shows an operational example that is interpreted as a vertical-relationship translation operation. As shown, designated position points A and B respectively move from At₁ and Bt₁ to At₅ and Bt₅. The input is thus interpreted as a vertical-relationship translation operation.

[0280] FIGS. 78A-78D show the corresponding data samples that are interpreted as the vertical-relationship translation operation. In a graph 7801, the angle t₁ representing the relationship of the designated positions is 108.43° when the designated positions A and B respectively are placed at coordinates At₁(4,5) and coordinates Bt₁(3,8) at travel start time t₁. The angle t₅ representing the relationship of the designated positions is 108.43° when the designated position points A and B are respectively placed at coordinates A_(t) 5 (8,5) and at coordinates Bt₅(7,8) at travel end time t₅. Tables 7802 list position data of the designated position point A and the designated position point B from time t₁ to time t₅. A table 7803 lists data of the positional relationship between the designated positions, namely, the angles of the lines connecting the designated positions with respect to the horizontal line from time t₁ to time t₅.

[0281]FIGS. 79A and 79B show an operational example that is interpreted as a lateral relationship translation operation. As shown, designated position points A and B respectively move from At₁ and Bt₁ to At₅ and Bt₅. The input is thus interpreted as a lateral-relationship translation operation.

[0282] FIGS. 80A-80D show the corresponding data samples that are interpreted as the lateral-relationship translation operation. In a graph 8001, the angle t₁ representing the relationship of the designated positions is 26.57° when the designated position points A and B respectively are placed at coordinates At₁(3,8) and coordinates Bt₁(5,9) at travel start time t₁. The angle t₅ representing the relationship of the designated positions is 26.57° when the designated position points A and B are respectively placed at coordinates At₅(7,8) and at coordinates Bt₅(9,9) at travel end time t₅. Tables 8002 list position data of the designated position point A and the designated position point B from time t₁ to time t₅. A table 8003 lists data of the positional relationship between the designated position points, namely, the angles of the lines connecting the designated positions with respect to the horizontal line from time t₁ to time t₅.

[0283] Tenth Embodiment

[0284] A tenth embodiment of the present invention is now discussed. The tenth embodiment accounts for a change in a positional relationship between a plurality of designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0285]FIG. 81 is a flow diagram showing a designation interpretation process based on a positional relationship between designated positions. In step S8101, a process is performed to determine a change in the positional relationship between the designated positions. In step S8102, a designation interpretation process is performed to interpret the input based on the data of the change in the positional relationship.

[0286]FIG. 82 is a flow diagram showing a designation interpretation process based on the positional relationship between the designated positions. In step S8201, the amount of angle change is checked. When the amount of angle change is in a direction of inversion, the algorithm proceeds to step S8202. The input is then interpreted as a command for one of an inversion operation, a deleting operation, and a cutting operation. When the amount of angle change is not in a direction of inversion in the step S8201, the algorithm proceeds to step S8203. A positional change in the X direction is checked. When the designated positions are laterally inverted, the algorithm proceeds to step S8204. The input is interpreted as a command for one of a laterally right-left inverting operation, a deleting operation, and a cutting operation.

[0287] When the positional change in the X direction is not laterally inverted in the step S8203, the positional change in the Y direction is checked in step S8205. When the designated positions are found to be vertically inverted in the step S8205, the algorithm proceeds to step S8206. The input is thus interpreted as a command for one of a vertically up and down inverting operation, a deleting operation, and a cutting operation. When the designated positions are not vertically inverted in the step S8205, the algorithm proceeds to step S8207. The input is interpreted as a command for one of an expansion operation, and a contraction operation.

[0288]FIG. 83 is a flow diagram showing an algorithm for acquiring a change in the positional relationship between the designated positions. In step S8301, a process is performed to acquire the angle of the designated positions. In step S8302, a process is performed to acquire a change in the angle of the designated positions. When the angle change acquired in the step S8302 falls within a predetermined range with respect to a bilaterally symmetrical direction in step S8303, the algorithm proceeds to step S8304. The positional relationship change between the designated positions is interpreted as an inversion operation.

[0289] When the acquired angle change is found to fall outside the predetermined range in step S8303, the algorithm proceeds to step S8305. In step S8305, a process is performed to determine a lateral positional relationship between the designated positions. In step S8306, a process is performed to determine a change in the lateral positional relationship between the designated positions. The algorithm proceeds to step S8307. When the acquired change in the lateral positional relationship is found to be negative in the step S8307, the algorithm proceeds to step S8308, and the acquired change in the lateral positional relationship is interpreted as a laterally right and left inverting operation.

[0290] When the acquired change in the lateral positional relationship is found to be positive in the step S8307, the algorithm proceeds to step S8309. In step S8309, a process is performed to determine a vertical positional relationship between the designated positions. In step S8310, a process is performed to determine a change in the vertical positional relationship between the designated positions. The algorithm proceeds to step S8311. When the acquired change in the vertical positional relationship is found to be negative in the step S8311, the algorithm proceeds to step S8312. The acquired change in the vertical positional relationship is thus interpreted as a vertically up and down inverting operation. On the other hand, when the acquired change is found to be positive in the step S8311, the algorithm proceeds to step S8313, and the positional relationship is thus determined to be free from any change.

[0291]FIGS. 84A and 84B show an operational example that is interpreted as an inversion operation. As shown, designated position points A and B respectively move from points At₁ and Bt₁ to points At₅ and Bt₅. This input is interpreted as the inversion operation.

[0292] FIGS. 85A-85D show the corresponding data samples that are interpreted as the inversion operation. In a graph 8501, the angle t₁ of the line connecting the designated position point A to the designated position point B with respect to the horizontal line is 14.04° when the designated position points A and B respectively are placed at coordinates At₁(4,10) and coordinates Bt₁(8,11) at travel start time t₁. The angle t₅ of the line connecting the designated position point A to the designated position point B is −165.96° when the designated position points A and B are respectively placed at coordinates At₅(8,4) and at coordinates Bt₅(4,3) at travel end time t₅. Tables 8502 list position data of the designated position point A and the designated position point B from time t₁ to time t₅. A table 8503 lists data of the positional relationship between the designated positions. Specifically, the table 8503 stores the changes in the positional relationship between the designated positions in the X direction, and in the Y direction, and in the angle of the designated positions. In this case, the change in the positional relationship is 180°, indicating that the designated position point A and the designated position point B are inverted in position.

[0293]FIGS. 86A and 86B show an operational example that is interpreted as a lateral inversion operation. As shown, the designated position points A and B respectively move from points At₁ and Bt₁ to points At₅ and Bt₅. This input is interpreted as a laterally right and left inverting operation.

[0294] FIGS. 87A-87D show the corresponding data samples that are interpreted as the lateral inversion operation. In a graph 8701, the angle t₁ of the line connecting the designated position point A to the designated position point B with respect to the horizontal line is 71.57° when the designated position points A and B respectively are placed at coordinates At₁(10,10) and coordinates Bt₁,(11,13) at travel start time t₁. The angle t₅ of the line connecting the designated position point A to the designated position point B is 116.57° when the designated position points A and B are respectively placed at coordinates At₅(9,3) and at coordinates Bt₅(8,5) at travel end time t₅. Tables 8702 list position data of the designated position point A and the designated position point B from time t₁ to time t₅. A table 8703 lists data of the positional relationship between the designated positions. Specifically, the table 8703 stores the changes in the positional relationship between the designated positions in the X direction, and in the Y direction, and in the angle of the designated positions. Since the positional relationship in the X direction changes from negative to positive in this case, the designated position points A and B are laterally inverted.

[0295]FIGS. 88A and 88B show an operational example that is interpreted as a vertical inversion operation. As shown, the designated position points A and B respectively move from points At₁ and Bt₁ to points At₅ and Bt₅. This input is interpreted as a vertically up and down inverting operation.

[0296] FIGS. 89A-89D show the corresponding data samples that are interpreted as the vertical inversion operation. In a graph 8901, the angle t₁ of the line connecting the designated position point A to the designated position point B with respect to the horizontal line is 56.31° when the designated position points A and B respectively are placed at coordinates At₃(5,12) and coordinates Bt₁(7,15) at travel start time t₁. The angle t₅ of the line connecting the designated position point A to the designated position point B is −45.00° when the designated position points A and B are respectively placed at coordinates At₅(5,2) and at coordinates Bt₅(6,1) at travel end time t₅. Tables 8902 list position data of the designated position point A and the designated position point B from time t₁ to time t₅. A table 8903 lists data of the positional relationship between the designated positions. Specifically, the table 8903 stores the changes in the positional relationship between the designated positions in the X direction, and in the Y direction, and in the angle of the designated positions. Since the positional relationship in the Y direction changes from negative to positive in this case, the designated position points A and B are vertically up and down inverted.

[0297] Eleventh Embodiment

[0298] An eleventh embodiment of the present invention is now discussed. The eleventh embodiment accounts for a positional relationship between a designated fixed position and a designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0299]FIG. 90 is a flow diagram showing an algorithm for determining a positional relationship between designated positions. In step S9001, a process is performed to detect the designated fixed position. In step 9002, a process is performed to determine the positional relationship between the designated fixed position and the designated moving position.

[0300]FIG. 91 is a flow diagram of a designation interpretation process based on the positional relationship to the designated fixed position. In step S9101, a process is performed to interpret the input based on the determined positional relationship data.

[0301]FIG. 92 is a flow diagram showing in detail the designation interpretation process based on the positional relationship of the designated fixed position. In step S9201, a process is performed to acquire the direction of travel of the designated moving position. In step S9202, the travel direction is determined. When the travel direction is found to be leftward in the step S9202, the algorithm proceeds to step S9203.

[0302] When the positional relationship of the designated moving position is found to be to the right of the designated fixed position in the step S9203, the algorithm proceeds to step S9207. The input is interpreted as a command for one of a next-item operation, a next-page operation, a next-screen operation, a last-line operation, and a contraction operation in a lateral direction only. When the positional relationship of the designated moving position is found to be the left of the designated fixed position in the step S9203, the algorithm proceeds to step S9208. The input is interpreted as a command for one of a leftward screen shifting operation and an expansion operation in a lateral direction only. When the positional relationship of the designated moving position is found to be above the designated fixed position in the step S9203, the algorithm proceeds to step S9209. The input is interpreted as a command for a counterclockwise rotation operation. When the positional relationship of the designated moving position is found to be below the designated fixed position in the step S9203, the algorithm proceeds to step S9210. The input is interpreted as a command for a clockwise rotation operation.

[0303] When the travel direction is found to be upward in the step S9202, the algorithm proceeds to step S9204. When the positional relationship of the designated moving position is found to be to the right of the designated fixed position in the step S9204, the algorithm proceeds to step S9211. The input is interpreted as a command for a counterclockwise rotation operation. When the positional relationship of the designated moving position is found to be to the left of the designated fixed position in the step S9204, the algorithm proceeds to step S9212. The input is interpreted as a command for a clockwise rotation operation. When the positional relationship of the designated moving position is found to be above the designated fixed position in the step S9204, the algorithm proceeds to step S9213. The input is interpreted as a command for a screen upward shifting operation or an expansion operation in a vertical direction. When the positional relationship of the designated moving position is found to be below the designated fixed position in the step S9204, the algorithm proceeds to step S9214. The input is interpreted as a command for one of a next-item operation, a next-page operation, a next-screen operation, a last-line operation, and a contraction operation in a lateral direction only.

[0304] When the travel direction is found to be downward in the step 9202, the algorithm proceeds to step S9205. When the positional relationship of the designated moving position is found to be to the right of the designated fixed position in the step S9205, the algorithm proceeds to step S9215. The input is interpreted as a command for a clockwise rotation operation. When the positional relationship of the designated moving position is found to be to the left of the designated fixed position in the step S9205, the algorithm proceeds to step S9216. The input is interpreted as a command for a counterclockwise rotation operation. When the positional relationship of the designated moving position is found to be above the designated fixed position in the step S9205, the algorithm proceeds to step S9217. The input is interpreted as a command for one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, and a contraction operation in a vertical direction only. When the positional relationship of the designated moving position is found to be below the designated fixed position in the step S9205, the algorithm proceeds to step S9218. The input is interpreted as a command for a downward screen shifting operation.

[0305] When the travel direction is found to be rightward in the step S9202, the algorithm proceeds to step S9206. When the positional relationship of the designated moving position is found to be to the right of the designated fixed position in the step S9206, the algorithm proceeds to step S9219. The input is interpreted as a command for one of rightward screen shifting operation and an expansion operation in a lateral direction only. When the positional relationship of the designated moving position is found to be to the left of the designated fixed position in the step S9206, the algorithm proceeds to step S9220. The input is interpreted as a command for one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, and a contraction operation in a vertical direction only. When the positional relationship of the designated moving position is found to be above the designated fixed position in the step S9206, the algorithm proceeds to step S9221. The input is interpreted as a command for a clockwise rotation operation. When the positional relationship of the designated moving position is found to be below the designated fixed position in the step S9206, the algorithm proceeds to step S9222. The input is interpreted as a command for a counterclockwise rotation operation.

[0306]FIG. 93 is a flow diagram showing an algorithm for determining the positional relationship to the designated fixed position. In step S9301, a process is performed to acquire an angle of the designated positions. When the acquired angle is found to fall within a predetermined range in an upward direction in step S9302, the positional relationship of the designated positions is determined to be upward in step S9303. When the acquired angle is found to fall within a predetermined range in a downward direction in the step S9302, the positional relationship is determined to downward in step S9304. When the acquired angle is found to fall within a predetermined range in a leftward direction in the step S9302, the positional relationship is determined to be leftward in step S9305. When the acquired angle is found to fall within a predetermined range in a rightward direction in the step S9302, the positional relationship is determined to be leftward in step S9306.

[0307]FIG. 94 is a flow diagram showing an algorithm for acquiring the direction of travel of a designated position. As shown, in step S9401, a process is performed to acquire the angle of travel of a designated position. When the acquired angle is found to fall within a predetermined range in an upward direction in step S9402, the travel direction relationship of the designated positions is determined to be upward in step S9403. When the acquired angle is found to fall within a predetermined range in a downward direction in the step S9402, the travel direction is determined to downward in step S9404. When the acquired angle is found to fall within a predetermined range in a leftward direction in the step S9402, the travel direction is determined to be leftward in step S9405. When the acquired angle is found to fall within a predetermined range in a rightward direction in the step S9402, the travel direction is determined to be rightward in step S9406.

[0308]FIGS. 95A and 95B show two operational examples that are interpreted as a next-item operation or a leftward screen shifting operation depending on the positional relationship of designated positions even though the travel directions thereof are the same. As shown in FIG. 95A, a designated position point B, placed to the right of a designated fixed position point A, leftward moves. An operation to perform is interpreted as one of a next-item operation, a next-screen operation, a last-line operation, and a contraction operation in a lateral direction only. On the other hand, as shown in FIG. 95B, a designated moving position point D, placed to the left of a designated fixed position point C, leftward moves. An operation to perform is interpreted as one of a leftward screen shifting operation and an expansion operation in a lateral direction only.

[0309] When the designated moving position point, placed above the designated fixed position point, leftward moves, an operation to perform is interpreted as a counterclockwise rotation operation. When the designated moving position point, placed below the designated fixed position point, leftward moves, an operation to perform is interpreted as a clockwise rotation operation.

[0310] When the travel direction is upward, the following interpretations are preformed depending on the positional relationship. With the designated moving position point placed to the right of the designated fixed position point, an operation to perform is interpreted as a counterclockwise rotation operation. With the designated moving position point placed to the left of the designated fixed position point, an operation to perform is interpreted as a clockwise rotation operation. With the designated moving position placed above the designated fixed position point, an operation to perform is interpreted as one of an upward screen shifting operation, and an expansion operation in a vertical direction only. With the designated moving position point placed below the designated fixed position point, an operation to perform is interpreted as a next-item operation, a next-page operation, a next-screen operation, a last-line operation, and a contraction operation in a vertical direction only.

[0311] When the travel direction is downward, the following interpretations are preformed depending on the positional relationship. With the designated moving position point placed to the right of the designated fixed position point, an operation to perform is interpreted as a clockwise rotation operation. With the designated moving position point placed to the left of the designated fixed position point, an operation to perform is interpreted as a counterclockwise rotation operation. With the designated moving position placed above the designated fixed position point, an operation to perform is interpreted as one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, and a contraction operation in a vertical direction only. With the designated moving position point placed below the designated fixed position point, an operation to perform is interpreted as one of a downward screen shifting operation and an expansion operation in a vertical direction only.

[0312] When the travel direction is rightward, the following interpretations are preformed depending on the positional relationship. With the designated moving position point placed to the right of the designated fixed position point, an operation to perform is interpreted as one of a rightward screen shifting operation and an expansion operation in a lateral direction only. With the designated moving position point placed to the left of the designated fixed position point, an operation to perform is interpreted as a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, and a contraction operation in a vertical direction only. With the designated moving position placed above the designated fixed position point, an operation to perform is interpreted as a clockwise rotation operation. With the designated moving position point placed below the designated fixed position point, an operation to perform is interpreted as a counterclockwise rotation operation.

[0313] FIGS. 96A-96D show the corresponding data samples that are interpreted as a next-item operation. In a graph 9601, a designated fixed position point A remains stationary at A(3,3), a designated moving position point B is placed at Bt₁(6,2.8) at travel start time t₁ and at Bt₅(4,2) at travel end time t₅. Tables 9602 list position data of the designated fixed position point A and the designated moving position point B from time t₁ to time t₅. A table 9603 lists the positional relationship between the designated fixed position and the designated moving position. As listed, at the travel end time t₅, the designated fixed position point A has a distance of travel of zero, and the designated moving position point B has a distance of travel of 2.236. The positional relationship between the designated fixed position A and the designated moving position B is changed from 176.19° at the travel start time t₁ to 135.00° at the travel end time t₅. The direction of travel of the designated moving position point B is −153.43°.

[0314] Twelfth Embodiment

[0315] A twelfth embodiment of the present invention is now discussed. The twelfth embodiment accounts for a change in the positional relationship between two designated fixed positions and a single designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0316]FIG. 97 is a flow diagram showing an algorithm for determining a positional relationship between designated fixed positions and a designated moving position. As shown, in step S9701, a process is performed to determine the positional relationship between the two designated fixed positions and the designated moving position. In step S9702, a designation interpretation process is performed to interpret the input based on the acquired positional relationship.

[0317]FIG. 98 is a flow diagram showing an algorithm for determining the positional relationship between designated positions. In step S9801, the angle of a line connecting the two designated fixed positions (fixed-to-fixed-position angle) is acquired. In step S9802, a process is performed to acquire the angle of a line connecting one of the two designated fixed positions to the designated moving position (fixed-to-moving-position angle). In step S9803, a process is performed to acquire the relationship between the angle of the line connecting the two designated fixed position and the angle of the line connecting the one of the two designated fixed position and the designated moving position. In step S9804, a process is performed to acquire a change in the relationship between the two angles.

[0318]FIG. 99 is a flow diagram showing an algorithm for determining the positional relationship between the designated positions. When the fixed-to-fixed-position angle is smaller than the fixed-to-moving-position angle in step S9901, the algorithm proceeds to step S9902, and the positional relationship is determined to be in a clockwise rotation direction. When the fixed-to-fixed-position angle equals the fixed-to-moving position angle in step S9901, the algorithm proceeds to step S9903, and the positional relationship is determined to be coincident. When the fixed-to-fixed-position angle is greater than the fixed-to-moving position angle in step S9901, the algorithm proceeds to step S9904, and the positional relationship is determined to be in a counterclockwise rotation direction.

[0319]FIG. 100 is a flow diagram showing an algorithm for acquiring a change in the positional relationship between the designated positions. When the latest position of a designated position fails to coincide with the initial position thereof in step S10001, the algorithm proceeds to step S10002. When the initial positional relationships of the designated positions fail to be coincident in step S10002, the algorithm proceeds to step S10003. When the latest positional relationships of the designated positions fail to be coincident in step S10003, the algorithm proceeds to step S10004. The positional relationship is thus determined to be an inversion.

[0320]FIG. 101 is a flow diagram showing the designation interpretation process based on the positional relationship between the designated fixed positions and the designated moving position. When the determined change in the positional relationship is found to be an inversion in step S10101, the algorithm proceeds to step S10102. The input is thus interpreted as an inversion operation with respect to a line connecting the designated fixed positions.

[0321]FIGS. 102A and 102B show an operational example that is interpreted as a symmetrical inversion operation. There are shown two designated fixed position points A and B, and a designated moving position point C. The designated moving position point C moves from Ct₁ to Ct₅. This input is interpreted as a symmetrical inversion operation.

[0322] FIGS. 103A-103E show the corresponding data samples that are interpreted as the symmetrical inversion operation. In a graph 10301, there are shown the designated fixed positions A(3,1) and B(4,6). The fixed-to-fixed-position angle therebetween is 78.69° with respect to the X direction. The designated moving position point C is placed at Ct₁(5,3) at travel start time t1, and the fixed-to-moving-position angle t₁ to the designated fixed position point A is 45.00°. The point Ct₁(5,3) is placed to the right of the line AB connecting the two designated fixed position points A and B. The designated moving position point B is placed at Ct₅(3,3) at travel end time t₅. The fixed-to-moving-position angle t₅ to the designated fixed position point A is 90.00° with respect to the X direction. The point Ct₅ is placed to the left of the line AB connecting the two designated fixed positions.

[0323] Tables 10302 list position data of the designated fixed position points A and B and the designated moving position point C from time t₁ to time t₅. A table 10303 lists the positional relationship between the two designated fixed positions and the designated moving position. As listed, the fixed-to-fixed-position angle remains unchanged from 78.69°, and the fixed-to-moving-position angle t₁ increases from 45.00° at t₁ to 90.00° at t₅, thereby becoming greater than the fixed-to-fixed-position angle.

[0324] Thirteenth Embodiment

[0325] A thirteenth embodiment of the present invention is now discussed. The thirteenth embodiment accounts for a change in the positional relationship between three designated fixed positions and a single designated moving position when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0326]FIG. 104 is a flow diagram showing an algorithm for at least three designated fixed positions. When there are at least three designated fixed positions in step S10401, the algorithm proceeds to step S10402. A process is performed to determine a positional relationship between at least three designated fixed positions and a designated moving position. In step S10403, a designation interpretation process is performed to interpret the input based on the positional relationship.

[0327]FIG. 105 is a flow diagram of a process for determining the positional relationship of the designated moving position with respect to the plurality of designated fixed positions. In step S10501, a process is performed to acquire fixed-to-fixed-position angles. In step S10502, a process is performed to acquire the angle of a line connecting the designated moving position and one of the plurality of designated fixed positions (fixed-to-moving-position angle). In step S10503, a process is performed to determine a relationship between the fixed-to-fixed-position angle and the fixed-to-moving-position angle. In step S10504, a process is performed to acquire a change in the relationship of the angles.

[0328]FIG. 106 is a flow diagram of a process for acquiring the positional relationship between at least three designated fixed positions and a single designated moving position. In step S10601, designated fixed positions are retrieved from a list of designated fixed positions from a designated fixed position table. A first designated fixed position is retrieved from the designated fixed position list in step S10602. When the designated fixed position to be retrieved is higher in listing order than the last designated fixed position in the list in step S10603, the algorithm proceeds to step S10604 to retrieve the designated fixed position. In step S10605, the fixed-to-moving-position angle is found to be not more than the maximum fixed-to-fixed-position angle, the algorithm proceeds to step S10606. When the fixed-to-moving-position angle is found to be not less than the minimum fixed-to-fixed-position angle in the step S10606, the algorithm proceeds to step S10607 to advance in the list.

[0329] When the designated fixed position reaches the last one in the list in the step S10603, the algorithm proceeds to step S10608. The designated moving position is interpreted as being present within an area defined by the designated fixed positions. When the fixed-to-moving-position angle is found to be more than the maximum fixed-to-fixed-position angle in the step S10605, the algorithm proceeds to step S10609. When the fixed-to-moving-position angle is found to be less than the minimum fixed-to-fixed-position angle in step S10606, the algorithm proceeds to step S10609. The designated moving position is interpreted as being present outside the area of the designated fixed positions.

[0330]FIG. 107 shows an operational example that is interpreted to mean that the designated moving position is within an area defined by the designated fixed positions. As shown, the positional relationship of a designated moving position Dt₁ is interpreted as being within the area that is enclosed by designated fixed positions A, B, and C.

[0331] FIGS. 108A-108F show the corresponding data samples which are interpreted to mean that the designated moving position is within the area defined by the designated fixed positions. In a graph 10801, there are shown the designated fixed position A(3,1), the designated fixed position B(4,6), the designated fixed position C(6,5.5), and the designated moving position Dt₁(4,4). The angle DAO of the line connecting the designated fixed position to the point Dt₁, being 71.57°, is between the angle BAO at the designated fixed position A being 78.69° and the angle CAO at the designated fixed position A being 56.31°. The angle O'BD of the line connecting the point Dt₁ to the designated fixed position B, being −90.00°, is between the angle O'BA at the designated fixed position B being −101.31° and the angle O'BC ad the designated fixed position B being −14.04°.

[0332] Tables 10802 list position data of the designated fixed positions A, B, and C, and the designated moving position D. A table 10803 list changes in the positional relationship between the designated fixed positions and the designated moving position. As listed, the angle DAO from the designated fixed position to the designated moving position D (fixed-to-moving-position angle), being 71.57°, is between the (fixed-to-fixed-position) angle BAO being 78.69° and the (fixed-to-fixed-position) angle CAO being 56.31°. The angle O'BD from the designated moving position D to the designated fixed position B (fixed-to-moving-position angle) being −90.00°, is between the (fixed-to-moving) angle O'BA being −101.31° and the (fixed-to-fixed) angle O'BC being −14.04°.

[0333]FIG. 109 is a flow diagram showing an algorithm for acquiring the positional relationship between the designated positions. When the change in the positional relationship is determined to be an outward shifting out from within the area in step S10901, the algorithm proceeds to step S10902. The input is thus interpreted as an outward shifting operation from within the area. When the change in the positional relationship is determined not to be an outward shifting operation out from within the area in step S10901, the algorithm proceeds to step S10903. When the change in the positional relationship is determined to be an inward shift operation into the area in the step S10903, the algorithm proceeds to step S10904. The input is thus interpreted as an inward shifting operation into the area.

[0334]FIG. 110A and 110B show an operational example which is interpreted as an outward shifting operation from within the area of the designated fixed positions. As shown, the moving position Dt₁ outwardly moves to Dt₅ out of the area enclosed by the designated fixed positions A, B, and C. In the positional relationship of the designated moving position to the plurality of designated fixed positions, the input is thus interpreted as an outward shifting operation out of the area of the designated fixed positions.

[0335] FIGS. 111A-111F show the corresponding data samples which are interpreted to mean the outward shifting operation from within the area in a positional relationship change determination process. In a graph 11101, there are shown a designated fixed position point A(3,1), a designated fixed position point B(4,6), a designated fixed position point C(6,5.5), and a designated moving position point Dt₁(4,4) at travel start time t₁. The angle DAO of the line connecting the point Dt₁ to the designated fixed position point A, being 71.57°, is between the angle BAO at the designated fixed position point A being 78.69° and the angle CAO at the designated position point A being 56.31°. The angle O'BD of the line connecting the point Dt₁ to the designated fixed position point B being −90.00° is between the angle O'BA at the designated fixed position B being −101.31° and the angle O'BC ad the designated fixed position B being −14.04°. At the travel end time t₅ the designated moving position point moves to Dt₅(3,4). The angle DAO of the line connecting the point Dt₅ to the designated fixed position point A, being 90.00°, falls outside the range between the angle BAO at the designated fixed position point A being 78.69° and the angle CAO at the designated position point A being 56.31°. The angle O'BD of the line connecting the point Dt₅ to the designated fixed position point B being −116.57 falls outside the range between the angle O'BA at the designated fixed position B being −101.31° and the angle O'BC ad the designated fixed position B being −14.04°.

[0336] Tables 11102 list position data of the designated fixed position points A, B, and C, and the designated moving position point D from time t₁ to time t₅. A table 11103 lists the change in the positional relationship between the designated fixed positions and the designated moving position. As listed, both the angle DAO of the line connecting the point D to the designated fixed position point A, and the angle O'BD of the line connecting the point D to the designated fixed position point B fall within the respective ranges determined by the area of the designated fixed positions from time t₁ to time t₃, and depart from the respective ranges at time t₄.

[0337]FIG. 112 is a flow diagram showing a designation interpretation process based on the positional relationship of a designated moving position to a plurality of designated fixed positions. When the positional relationship is determined to be an outward shifting operation from within the area in step S11201, the algorithm proceeds to step S11202. The input is then interpreted as a deleting operation for deleting the area of the designated fixed positions. When the positional relationship is determined not to be an outward shifting operation from within the area in step S11201, the algorithm proceeds to step S11203. When the positional relationship is determined to be an inward shifting operation into the area in step S11203, the algorithm proceeds to step S11204. The input is interpreted as an operation for imparting an attribute to the area of the designated fixed positions. The attribute imparting operation may include the coloring of the area of the designated fixed positions.

[0338]FIGS. 113A and 113B show an operational example that is interpreted to mean that an attribute is imparted to the area defined by the designated fixed positions. When a designated moving position point D is shifted from Dt₁ to Dt₅ into the area enclosed by designated fixed positions A, B, and c, an operation to perform is interpreted as a coloring operation for coloring the area of the designated fixed positions.

[0339] FIGS. 114A-114F show the corresponding data samples that are interpreted as a coloring operation, from among attribute imparting operations, to the area defined by the designated fixed positions, in a designated fixed-position based designation interpretation process. In a graph 11401, there are shown a designated fixed position point A(3,1), a designated fixed position point B(4,6), a designated fixed position point C(6,5.5), and a designated moving position point Dt₁(3,4) at travel start time t₁. The angle DAO of the line connecting the point Dt₁ to the designated fixed position point A, being 90.00°, falls outside the range between the angle BAO at the designated fixed position point A being 78.69° and the angle CAO at the designated position point A being 56.31°. The angle O'BD of the line connecting the point Dt₁ to the designated fixed position point B being −116.57 falls outside the range between the angle O'BA at the designated fixed position B being −101.31° and the angle O'BC ad the designated fixed position B being −14.04°. At the travel end time t₅, the angle DAO of the line connecting the point Dt₅ to the designated fixed position point A, being 71.57°, is between the angle BAO at the designated fixed position point A being 78.69° and the angle CAO at the designated position point A being 59.04°. The angle O'BD of the line connecting the point Dt₅ to the designated fixed position point B being −90.00° is between the angle O'BA at the designated fixed position B being −101.31° and the angle O'BC ad the designated fixed position B being −14.04°.

[0340] Tables 11432 list position data of the designated fixed position points A, B, and C, and the designated moving position point D from time t₁ to time t₅. A table 11433 lists the change in the positional relationship between the designated fixed positions and the designated moving position. As listed, both the angle DAO of the line connecting the point D to the designated fixed position point A, and the angle O'BD of the line connecting the point D to the designated fixed position point B remains outside the respective ranges determined by the area of the designated fixed positions from time t₁ to time t₃, and enter the respective ranges at time t₄.

[0341] Fourteenth Embodiment

[0342] A fourteenth embodiment of the present invention is now discussed. The fourteenth embodiment accounts for a change in a number of a plurality of designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0343]FIG. 115 is a flow diagram showing a designation interpretation process based on a change in the count of a plurality of designated positions. In step S11501, a process is performed to acquire a designated position count. In step S11502, a process is performed to acquire a change in the designated position count. In step S11503, a designation interpretation process is performed to interpret the input based on the acquired designated position count.

[0344]FIG. 116 is a flow diagram showing the designation interpretation process based on the change in the initial count of designated positions. In step S11601, a current designated position count is compared with an initial designated position count. When it is determined in step S11602 that the current designated position count is greater than the initial designated position count, the algorithm proceeds to step S11603. The input is interpreted as being in the middle of designating an object.

[0345]FIGS. 117A and 117B show an operational example that is interpreted to mean that the designation of an object to be processed is on its way through the designation interpretation process using the change in the designated position count. There are shown two designated position points At1 and Bt₁ at time t₁ in FIG. 117A. There are shown three designated position points of At₂, Bt₂, and Ct₂ at time t₂ in FIG. 117B. The designated position count increases from two at time t₁ to three at time t₂.

[0346] FIGS. 118A-118F show the corresponding data samples that are interpreted to mean that the designation of the object to be processed is on its way. In graphs 11801, FIG. 118A shows the two designated positions of At₁ and Bt₁ occurring at time t₁ and FIG. 118B shows the three designated positions of At₂, Bt₂, and Ct₂ occurring at time t₂. Tables 11802 list position data of the designated position point A, the designated position point B, and the designated position point C from time t₁ to time t₃. A table 11803 lists the change in the designated position count. As listed, the designated position count is two at time t₁, resulting in a count change of zero. At time t₂, the designated position count is three, resulting a count change of one.

[0347]FIG. 119 is a flow diagram showing the designation interpretation process based on the change in the designated position count. In step S11901, a process is performed to acquire initial designated positions. When it is determined in step S11902 that the count of the acquired positions indicates any increase from the initial count of designated positions, the algorithm proceeds to step S11903. A designation interpretation process is performed to interpret the input based on the initial designated positions.

[0348]FIG. 120 is a flow diagram showing the designation interpretation process based the an initial designated position. When the designated position count is one, the algorithm proceeds to step S12002. An operation to perform is thus interpreted as a rotation operation about the acquired designated position.

[0349]FIGS. 121A and 121B show an operational example that is interpreted as the rotation operation about the designated position. An initial designated position point A is present at time t₁. At time t₅, there are shown the designated position point A and a designated position point Bt₅, which has shifted from point Bt₃. This input is interpreted as a rotation operation about the designated position point A.

[0350] FIGS. 122A-122D show the corresponding data samples which is interpreted as the rotation operation about the designated position. In a graph 12201, the designated position point A continuously stays at the same coordinates (3,3) from time t₁ to time t₆. The designated position point B takes coordinates Bt₃(6,2.8) at time t₃, coordinates Bt₄(5.6,3.5) at time t₄, coordinates Bt₅(5.2,4.2) at time t₅, and coordinates Bt₆(5,5) at time t₆. Tables 12202 list position data of the designated position points A and B from time t₁ to time t₆. A table 12203 lists the change in the designated position count. As listed, the designated position count remains one from time t₁ to time t₂, resulting in a count change of zero. The designated position count increases to two at time t₃, resulting in a count change of one. The count continuously remains unchanged to time t₆.

[0351] Fifteenth Embodiment

[0352] A fifteenth embodiment of the present invention is now discussed. The fifteenth embodiment accounts for a change in a number of a plurality of final designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0353]FIG. 123 is a flow diagram showing an algorithm that uses a change in the last count of designated positions. In step S12301, a process is performed to acquire a change in the final designated position count. In step 12302, a designation interpretation process is performed based on the change in the last designated position count.

[0354]FIG. 124 is a flow diagram showing the designation interpretation process based on the change in the last count of the designated positions. When the designated position count indicates a decrease in step S12401, the algorithm proceeds to step S12402. The input is interpreted as a canceling operation to cancel the immediately preceding operation. When the designated position count indicates no decrease in step S12401, the algorithm proceeds to step S12403. The input is interpreted as a confirmation operation to confirm the immediately preceding operation.

[0355]FIGS. 125A and 125B show an operational example that is interpreted as a canceling operation to cancel an immediately preceding operation in the designation interpretation process. As shown, there are three initial points At₁, Bt₁, and Ct₁ at time t₁. At time t₂, there are two designated position points At₂ and Bt₂. The designated position count is decreased by one from time t₁.

[0356] FIGS. 126A-126F show the corresponding data samples that are interpreted as the canceling operation to cancel the immediately preceding operation. In a graph 12601, there are the three initial designated position points At₁, Bt₁, and Ct₁ at time t₁. At time t₂, there are the two designated position points At₂ and Bt₂. Tables 12602 list position data of the designated position points A, B, and C from time t₁ to time t₂. A table 12603 lists the change in the designated position count. As listed, the designated position count is three at time t₁, thereby resulting in a count change of zero. The designated position count is two at time t₂, thereby resulting in a count change of −1.

[0357] Sixteenth Embodiment

[0358] A sixteenth embodiment of the present invention is now discussed. The sixteenth embodiment accounts for a designated position count as designated information other than the designated path when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0359]FIG. 127 is a flow diagram showing an algorithm that uses designated information other than a designated path. In step S12701, a process is performed to acquire designated information other than the designated path. The algorithm proceeds to step S12702. When it is determined in step S12702 that an operation is not repeated, the algorithm proceeds to step S12703. A designation interpretation process is performed to interpret the input based on the acquired designated information. When it is determined in the step S12702 that the operation is repeated, the algorithm proceeds to step S12704. The input is interpreted as a suspending operation to suspend the operation, and the process then proceeds to step S12703.

[0360]FIG. 128 is a flow diagram showing an algorithm that uses designated information other than a designated path. When the designated information is equal to or greater than the maximum criterion value, the algorithm proceeds to step S12802. The input is interpreted as a maximum operational amount. When the designated information is smaller than the maximum criterion value, the algorithm proceeds to step S12803. When the designated information is equal to or greater than a repetition criterion value, the algorithm proceeds to step S12804 to increase an operational amount. The algorithm proceeds to step S12805. The input is thus interpreted as an operation to narrow repetition intervals. When it is determined in the step S12803 that the designated information is smaller than the repetition criterion value, the algorithm proceeds to step S12806. The input is thus interpreted as an operation to increase the operational amount.

[0361]FIG. 129 is a flow diagram showing an algorithm that uses the count of all designated positions. In step S12901, a process is performed to acquire the count of all designated positions as the designated information other than the designated path.

[0362]FIG. 130 is a flow diagram showing a designation interpretation process based on the designated position count as the designated information other than the designated path. When the designated position count is equal to or greater than the maximum criterion value, the algorithm proceeds to step S13002. The input is interpreted as one of the maximum number of screens, the maximum number of items, and the maximum magnification. When the designated position count is smaller than the maximum criterion count, the algorithm proceeds to step S13003. When the designated position count is equal to or greater than a repetition criterion value in the step S13003, the algorithm proceeds to step S13004. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm proceeds to step S13005. The input is then interpreted as an operation to narrow repetition intervals. When it is determined in the step S13003 that the designated position number is smaller than the repetition criterion value, the algorithm proceeds to step S13006. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm proceeds to step S13007 to interpret the input as one of a page-turning operation, a screen shifting operation, an item advancing operation, and an expansion/contraction operation.

[0363]FIGS. 131A and 131B show an operational example that is interpreted as the page-turning operation. FIG. 131A shows two designated position points At₁ and Bt₁, appearing at time t₁. FIG. 131B shows a total of four designated position points At₂, Bt₂, Ct₂, and Dt₂ appearing at time t₂. Since the designated position count is increased to four at time t₂ from two at time t₁, the input is interpreted as an operation for increasing the number of pages in page turning.

[0364] FIGS. 132A-132H show the corresponding data samples that are interpreted as the page-turning operation. Graphs 13201 show two designated position points At₁ and Bt₁, appearing at time t₁ and a total of four designated position points At₂, Bt₂, Ct₂, and Dt₂ appearing at time t₂. Tables 13202 list position data of the designated positions A, B, C, and D from t₁ to t₂. A table 13203 lists the change in the designated position count. As listed, the increase in the designated position count is two at time t₁, resulting a total number of designated positions of three. At time t₂, the increase in the designated position count is two, resulting in a total number of five.

[0365] Seventeenth Embodiment

[0366] A seventeenth embodiment of the present invention is now discussed. The seventeenth embodiment accounts for the speed of travel of a designated position as the designated information other than the designated path when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0367]FIG. 133 is a flow diagram showing an algorithm for acquiring the speed of travel of the designated position as the designated position information other than the designated path. In step S13301, a process is performed to acquire the speed of travel of the designated position. In step S13302, a designation interpretation process is performed to interpret the input based on the travel speed of the designated position.

[0368]FIG. 134 is a flow diagram showing an algorithm for acquiring the speed of travel of the designated position. In step S13401, the distance of travel of the designated position from the immediately preceding point thereof is acquired. In step S13402, the speed of travel is calculated from the acquired travel distance and time needed for the travel.

[0369]FIG. 135 is a flow diagram showing the designation interpretation process based on the designated position travel speed as the designated information other than the designated path. When it is determined in step S13501 that the travel speed of the designated position is equal to or greater than the maximum criterion value, the algorithm proceeds to step S13502. The input is interpreted as one of the maximum number of pages, the maximum number of screens, the maximum number of items, and the maximum magnification. When it is determined in step S13501 that the travel speed of the designated position is smaller than the maximum criterion value, the algorithm proceeds to step S13503. When it is determined in step S13503 that the designated position travel speed is equal to or greater than the repetition criterion value, the algorithm proceeds to step S13504. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm proceeds to step S13505 to interpret the input as an operation to narrow repetition intervals. When it is determined in the step S13503 that the designated position travel speed is smaller than the repetition criterion value, the algorithm proceeds to step S13506. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm then proceeds to step S13507 to interpret the input as one of a page-turning operation, a screen shifting operation, an item advancing operation, and an expansion/contraction operation.

[0370] FIGS. 136A-136D show an operational example that is interpreted as a page turning using the designated position travel speed. Designated position points A and B respectively move from points At₁ and Bt₁ to At₅ and Bt₅ as shown in FIGS. 136A and 136B. Designated position points A′ and B′ respectively move from points A′t₁ and B′t₁ to A′t₅ and B′t₅ as shown in FIGS. 136C and 136D. The travel speed is considered to be higher in the first case shown in FIGS. 136A and 136B than in the second case shown in FIGS. 136C and 136D.

[0371] FIGS. 137A-137G show the corresponding data samples that are interpreted as the page turning using the designated position travel speed. In a graph 13701, at time t₁, the designated position points At₁ and A′t₁ are at the same coordinates (4,2), and the designated position points Bt₁ and B′t₁ are at the same coordinates (5,3). At time t₅, the designated positions A and B are respectively at coordinates At₅(3,3) and coordinates A′t₅(3,4), and coordinates Bt₅(4,4), and coordinates B′t₅(4,5).

[0372] Tables 13702 list position data of the designated positions A, B, A′, and B′ from t₁ to t₅. A table 13703 lists the travel speed of the designated positions. As listed, the travel speed of the designated position point A′ being 0.559 and the travel speed of the designated position point B′ being 0.559 are respectively greater than the travel speed of the designated position point A being 0.35 and the travel speed of the designated position point B being 0.283.

[0373] Eighteenth Embodiment

[0374] An eighteenth embodiment of the present invention is now discussed. The eighteenth embodiment accounts for a contact pressure of a designated position as the designated information other than the designated path when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0375]FIG. 138 is a flow diagram showing an algorithm that uses a contact pressure at a designated position as the designated information other than the designated path. In step S13801, a process is performed to acquire the contact pressure at the designated position. In step S13802, a designation interpretation process is performed to interpret the input based on the contact pressure at the designated position.

[0376]FIG. 139 is a flow diagram showing the designation interpretation process based on the designated position contact pressure. When it is determined in step S13901 that the contact pressure at the designated position is equal to or greater than the maximum criterion value, the algorithm proceeds to step S13902. The input is interpreted as one of the maximum number of screens, the maximum number of items, and the maximum magnification. When it is determined in the step S13901 that the contact pressure at the designated position is smaller than the maximum criterion value, the algorithm proceeds to step S13903. When it is determined in the step S13903 that the contact pressure at the designated position is equal to or greater than the repetition criterion value, the algorithm proceeds to step S13904. The input is interpreted as an operation to increase one of the number of screens, the number of items, and magnification. The algorithm then proceeds to step S13905 to narrow repetition intervals. When it is determined in the step S13903 that the contact pressure at the designated position is smaller than the repetition criterion value, the algorithm proceeds to step S13906. The input is interpreted as an operation to increase one of the number of screens, the number of items, and magnification. The algorithm proceeds to step S13907 to interpret the input as one of a screen shifting operation, an item advancing operation, and an expansion/contraction operation.

[0377] FIGS. 140A-140D show an operational example that is interpreted as a screen shifting operation in response to the designated position contact pressure. Designated position points At₁(3,3) and Bt₁(4,4) cause a high contact pressure than designated position points Ct₁(3,3) and Dt₁(4,4).

[0378] FIGS. 141A-141H show the corresponding data samples that are interpreted as the screen shifting operation in response to the designated position contract pressure. In graphs 14101, for a time elapse from time t₁ to time t₅, the designated position points A and B respectively move from At₁(3,3) and Bt₁(4,4) move to At₅(3,1) and Bt₅(4,2). Similarly, designated position points C and D respectively move from Ct₁(3,3) and Dt₁(4,4) to Ct₅(3,1) and Dt₅(4,2). Tables 14102 list position data of the designated position points A, B, C, and D from time t₁ to time t₅. A table 14103 lists the contact pressure at each designated position point. As listed, a change in the contact pressure of each of the designated position points C and D from time t₁ to time t₁ is greater than a change in the contact pressure of each of the designated position points A and B from time t₁ to time t₅.

[0379] Nineteenth Embodiment

[0380] A nineteenth embodiment of the present invention is now discussed. The nineteenth embodiment accounts for travel distances of a plurality of designated positions as the designated information other than the designated path when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0381]FIG. 142 is a flow diagram showing an algorithm that uses the distances of travel of a plurality of designated positions. In step S14201, a process is performed to acquire the distances of travel of the designated positions.

[0382] In step S14202, a designation interpretation process is performed to interpret the input based on the distances of travel of the designated positions.

[0383]FIG. 143 is a flow diagram showing the designation interpretation process based on the distances of travel of the plurality of designated positions. In this algorithm, when it is determined in step S14301 that the travel distance is equal to or greater than the maximum criterion value, the algorithm proceeds to step S14302. The input is interpreted as one of the maximum number of pages, the maximum number of screens, the maximum number of items, and the maximum magnification. When it is determined in the step S14301 that the travel distance is smaller than the maximum criterion value, the algorithm proceeds to step S14303. When it is determined in step S14303 that the travel distance is equal to or greater than a repetition criterion value, the algorithm proceeds to step S14304. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm then proceeds to step S14305 to interpret the input as an operation to narrow repetition intervals. When it is determined in the step S14303 that the travel distance is smaller than the repetition criterion value, the algorithm proceeds to step S14306. The input is interpreted as an operation to increase one of the number of pages, the number of screens, the number of items, and magnification. The algorithm then proceeds to step S14307 to interpret the input as one of a page shifting operation, a screen shifting operation, an item advancing operation, and an expansion/contraction operation.

[0384] FIGS. 144A-144D show an operational example that is interpreted as a page-turning operation in response to the distances of travel of the plurality of designated positions. Designated position points A and B are respectively moved from coordinates At₁(4,2) and coordinates Bt₁(5,3) at time t₁ to coordinates At₅(3,3) and coordinates Bt₅(4,4) at time t₅ as shown in FIGS. 144A and 144B. Designated position points A′ and B′ are respectively moved from coordinates A′t₁(4,2) and coordinates B′t₁(5,3) at time t₁ to coordinates A′t₅(3,6) and coordinates B′t₅(4,7) at time t₅ as shown in FIGS. 144C and 144D.

[0385] FIGS. 145A-145G show the corresponding data samples that are interpreted as the page-turning operation in response to the distances of travel of the plurality of designated positions. In a graph 14501, at time t₁, the designated position points At₁ and A′t₁ are at the same coordinates (4,2), and the designated position points Bt₁ and B′t₁ are at the same coordinates (5,3). At time t₅, the designated positions A and B are respectively at coordinates At₅(3,3) and coordinates A′t₅(3,6), and coordinates Bt₅(4,4), and coordinates B′t₅(4,7). Tables 14502 list position data of the designated positions A, B, A′, and B′ from t₁ to t₅. A table 14503 lists the travel distance data of the designated positions. As listed, the travel distance of the designated position point A′ being 4.123 and the travel speed of the designated position point B′ being 4.123 are respectively greater than the travel speed of the designated position point A being 1.414 and the travel speed of the designated position point B being 1.131.

[0386] Twentieth Embodiment

[0387] A twentieth embodiment of the present invention is now discussed. The twentieth embodiment accounts for stationary times of a plurality of designated positions when an operation to perform is interpreted from a combination of travel paths of at least two designated positions.

[0388]FIG. 146 is a flow diagram showing an algorithm that uses the stationary times of the plurality of designated positions. In step S14601, a process is performed to acquire stationary time of a designated position. The algorithm proceeds to step S14602. When it is determined that the designated position remains stationary for a predetermined duration of time, the algorithm proceeds to step S14603. The input is interpreted as an operation for designating an area. The designated area is thus clearly distinguished from the remaining area of a display. When it is determined that the designated position is not stationary in the step S14602, the algorithm proceeds to step S14604. The input is then interpreted as an operation for the designated area.

[0389]FIGS. 147A and 147B show an operational example that is interpreted as an area designating operation. Designated position points A and B are placed at At₁ and Bt₁, on a line of characters at time t₁. When the designated position points remains at At₅ and Bt₅ on the same line of character at time t₅ as shown, the area between the designated position points A and B is interpreted as being designated.

[0390] FIGS. 148A-148D show the corresponding data samples that are interpreted as the area designating operation. In a graph 14801, the designated position point A continuously stays at coordinates A(3,3) from time t₁ to time t₅. Also, the designated position point B continuously stays at coordinates B(4,4) from time t₁ to time t₅. Tables 14802 list position data of the designated position points A and B from time t₁ to time t₅. A table 14803 lists the distances of travel of the designated position points A and B. As listed, the distance of travel of the designated position point A is zero at time t₁, and is continuously zero from time t₂ to time t₅. Also, the distance of travel of the designated position point B is continuously zero from time t₁ to time t₅. The designated position points A and B remain stationary from time t₁ to time t₅.

[0391]FIGS. 149A and 149B show an operational example that is interpreted as an expansion operation to be effected on a designated area. The designated position points A and B are placed at At₅ and Bt₅ on a line of characters at time t₅. The designated position points A and B are respectively moved to At₆ and Bt₆ at time t₆. This input is now interpreted as an operation to expand the designated area.

[0392] FIGS. 150A-150D show the corresponding data samples that are interpreted as the expansion operation to be effected on the designated area. In a graph 15001, the designated position points A and B respectively continuously stay at the same coordinates A(3,3) and B(4,4) from time t₁ to time t₅. The coordinates A_(t) 6(2,2.5) and B_(t) 6(4,4) taken by the designated position points A and B at time t₆ are spaced more apart from each other than the coordinates At₅ and Bt₅ are at time t₅. Tables 15002 list position data of the designated position points A and B from time t₁ to time t₆. A table 15003 lists the change in the distance of travel of each designated position point. As listed, the travel distances of the designated position points A and B are zero from time t₁ to time t₅. The magnification resulting from the distance change between the designated position points A and B is 100%. At time t₆, the travel distance of the point A is 1.118 and the travel distance of the point B is 2.236. The magnification resulting from the distance change between the point A and the point B increases to 285%.

[0393] The present invention may be implemented in a system constructed of a plurality of apparatuses (including a host computer, interface units, a display, etc.) or may be implemented in a standalone apparatus.

[0394] A program code of software for carrying out the functions of the embodiments is loaded in a computer in a system or apparatus connected to a variety of devices so that the devices perform the functions of the above embodiments. The variety of devices operate according to the program code stored in the computer (CPU or MPU) in the system or apparatus. Such embodiments fall within the scope of the present invention. The program code of software performs the functions of the embodiment. The program code itself, and means for feeding the program code to the computer, for example, a storage medium for storing the program code, fall within the scope of the present invention.

[0395] Available as storage media for feeding the program code are a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, ROM and the like.

[0396] By executing the program code read by the computer, the functions of the embodiments are performed. Furthermore, the functions of the above embodiments are performed in cooperation with the OS (operating system) running on the computer or another application software program according to the instruction of the program code. Such a program code falls within the scope of the present invention.

[0397] The program code from the storage medium is read into a memory incorporated in a feature expansion board in the computer or in a feature expansion unit connected to the computer. The CPU mounted on the feature expansion board or the feature expansion unit performs partly or entirely the actual process in response to the instruction from the program code. The functions of the above embodiment are executed through the process. Such a program code falls within the scope of the present invention.

[0398] To incorporate the present invention to the storage medium, the program code of the above-referenced flow diagrams may be stored in the storage medium.

[0399] Although the present invention has been described in its preferred form with a certain degree of particularity, many apparently widely different embodiments of the invention can be made without departing from the spirit and the scope thereof. It is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims.

[0400] While the present invention has been described with reference to what are presently considered to be the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. On the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions. 

What is claimed is:
 1. A position information processing apparatus for processing position information comprising: a designated position detector means for concurrently detecting a plurality of designated positions; a designated position storage means for storing the plurality of designated positions detected by the designated position detector means; and a travel path recognizer means for recognizing the travel paths of the plurality of designated positions based on the plurality of preceding designated positions stored in the designated position storage means and the plurality of current designated positions detected by the designated position detector means.
 2. A position information processing apparatus according to claim 1, wherein the travel path recognizer means recognizes the travel paths of the plurality of designated positions by treating one of the plurality of preceding designated positions, closest to each of the plurality of current designated positions, as the preceding designated position of the current designated position.
 3. A position information processing apparatus according to claim 1, further comprising a designated-area detector means for detecting an area of a designated position, and a designated-area storage means for storing an area detected by the designated-area detector means, wherein the travel path recognizer means recognizes the travel paths of the plurality of designated positions by treating one of the plurality of preceding designated positions having an area, closest to the area of each of the plurality of current designated positions, as the preceding designated position of the current designated position.
 4. A position information processing apparatus according to claim 1, wherein the designated position detector means is a touch-panel-type detector means.
 5. A position information processing apparatus according to claim 1, wherein the designated position detector means comprises: an image-pickup means for picking up a scene in which an operator designates a position; and a designated-position recognizer means for recognizing the designated position from the image of the scene picked up by the image-pickup means.
 6. A position information processing apparatus according to claim 1, wherein the designated position detector means detects the position of a finger tip of an operator.
 7. An operation apparatus comprising: a path detector means for detecting paths of a plurality of concurrently moving designated positions; a designation interpreting means for interpreting a designation represented by a combination of the paths of the plurality of designated positions detected by the path detector means; and an operation means for performing an operation based on the designation interpreted by the designation interpreting means.
 8. An operation apparatus according to claim 7, wherein the designation interpreting means comprises: a distance measuring means for measuring a distance between a plurality of designated positions; a distance-change acquisition means for acquiring a change in the distance measured by the distance measuring means; and a distance-change interpreting means for interpreting the designation based on the distance change acquired by the distance-change acquisition means.
 9. An operation apparatus according to claim 8, wherein the distance-change interpreting means interprets the designation as a contraction operation when the acquired distance change decreases.
 10. An operation apparatus according to claim 8, wherein the distance-change interpreting means interprets the designation as an expansion operation when the acquired distance change increases.
 11. An operation apparatus according to claim 8, wherein the distance-change acquisition means acquires an amount of change in the measured distance, and the distance-change interpreting means interprets the designation as a command for one of a contraction operation and an expansion operation at a magnification corresponding to the acquired amount of change.
 12. An operation apparatus according to claim 7, wherein the designation interpreting means comprises: an angle measuring means for measuring an angle made between a reference line and a line that connects the plurality of designated positions; an angle-change acquisition means for acquiring a change in the angle measured by the angle measuring means; and an angle-change interpreting means for interpreting the designation based on the angle change acquired by the angle-change acquisition means.
 13. An operation apparatus according to claim 12, wherein the angle-change interpreting means interprets the designation as a command for a clockwise rotation operation when the acquired angle change is in a clockwise direction.
 14. An operation apparatus according to claim 12, wherein the angle-change interpreting means interprets the designation as a command for a counterclockwise rotation operation when the acquired angle change is in a counterclockwise direction.
 15. An operation apparatus according to claim 12, wherein the angle-change acquisition means acquires a change in the measured angle, and the angle-change interpreting means interprets the designation as a command for a rotation in an amount of rotation corresponding to the acquired amount of change.
 16. An operation apparatus according to claim 7, wherein the designation interpreting means comprises: a designated fixed position detector means for detecting a designed fixed position based on the paths of the plurality of designated positions; and a designated fixed-position-based designation interpreting means for interpreting the designation based on the designated fixed position detected by the designated fixed-position detector means and the paths of the designated positions other than the designated fixed position.
 17. An operation apparatus according to claim 16, wherein the designated fixed-position-based designation interpreting means comprises: a travel-direction acquisition means for acquiring the direction of travel of the designated position other than the designated fixed position; and a travel-direction interpreting means for interpreting the designation based on the direction of travel acquired by the travel-direction acquisition means.
 18. An operation apparatus according to claim 17, wherein the travel-direction interpreting means interprets the designation as a command for one of a next-item operation, a next-page, a next-screen operation, a last-line operation, a leftward screen shifting operation, an expansion operation in a lateral direction only, and a contraction operation in a lateral direction only, when the acquired direction of travel is leftward.
 19. An operation apparatus according to claim 17, wherein the travel-direction interpreting means interprets the designation as a command for one of a next-item operation, a next-page operation, a next-screen operation, a last-line operation, an upward screen shifting operation, an expansion operation in a vertical direction only, and a contraction operation in a vertical direction only, when the acquired direction of travel is upward.
 20. An operation apparatus according to claim 17, wherein the travel-direction interpreting means interprets the designation as a command for one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, a downward screen shifting operation, an expansion operation in a vertical direction only, and a contraction operation in a vertical direction only, when the acquired direction of travel is downward.
 21. An operation apparatus according to claim 17, wherein the travel-direction interpreting means interprets the designation as a command for one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, a rightward screen shifting operation, an expansion operation in a lateral direction only, and a contraction operation in a lateral direction only, when the acquired direction of travel is rightward.
 22. An operation apparatus according to claim 17, wherein the travel-direction acquisition means further acquires a distance of travel of the designated position, and interprets the designation as a command for an operation of an operational amount responsive to the acquired distance of travel.
 23. An operation apparatus according to claim 16, wherein the designated fixed-position-based designation interpreting means comprises: a fixed-to-fixed position distance measuring means for measuring the distance between the designated fixed position and the designated positions other than the designated fixed position; and a distance-change acquisition means for acquiring a change in the distance measured by the fixed-to-fixed-position distance measuring means; and a distance-change interpreting means for interpreting the designation based on the distance change acquired by the distance-change acquisition means.
 24. An operation apparatus according to claim 23, wherein the distance-change interpreting means interprets the designation as a command for one of a contraction operation about the designated fixed position and a screen shifting operation in the direction of travel when the distance change acquired by the fixed-to-fixed-position distance measuring means decreases.
 25. An operation apparatus according to claim 23, wherein the distance-change interpreting means interprets the designation as a command for an expansion operation about the designated fixed position or a screen shifting operation in the direction of travel when the distance change acquired by the fixed-to-fixed-position distance measuring means increases.
 26. An operation apparatus according to claim 23, wherein there are a plurality of designated positions other than the designated fixed positions, and wherein the distance-change interpreting means interprets the designation based on the change in the distance between the designated fixed position and each of the plurality of designated positions.
 27. An operation apparatus according to claim 23, wherein the distance-change acquisition means acquires the amount of change in the measured distance and wherein the distance-change interpreting means interprets the designation as a command for one of a contraction operation and an expansion operation, at a magnification responsive to the acquired amount of change.
 28. An operation apparatus according to claim 16, wherein the designated fixed-position-based designation interpreting means comprises: a moving-to-moving-position distance measuring means for measuring the distance between the designated positions other than the designated fixed position; a moving-to-moving-position distance change acquisition means for acquiring a change in the distance measured by the moving-to-moving-position measuring means; and a distance-change interpreting means for interpreting the designation based on the distance change acquired by the moving-to-moving-position change acquisition means.
 29. An operation apparatus according to claim 28, wherein the distance-change interpreting means interprets the designation as a command for a contraction operation about the designated moving position when the acquired distance change decreases.
 30. An operation apparatus according to claim 28, wherein the distance-change interpreting means interprets the designation as a command for an expansion operation about the designated moving position when the acquired distance change increases.
 31. An operation apparatus according to claim 28, wherein the moving-to-moving-position distance change acquisition means acquires the amount of change in the distance between the designated positions, and wherein the distance-change interpreting means interprets the designation as a command for one of a contraction operation and a expansion operation, at a magnification responsive to the acquired amount of change.
 32. An operation apparatus according to claim 28, wherein the distance-change interpreting means interprets the designation based on the change in each of the distances between at least three designated positions.
 33. An operation apparatus according to claim 16, wherein the designated fixed-position-based designation interpreting means comprises: an angle measuring means for measuring an angle made between a reference line and a line that connects the designated fixed position and the designated position other than the designated fixed position; an angle-change acquisition means for acquiring a change in the angle measured by the angle measuring means; and an angle-change interpreting means for interpreting the designation based on the angle change acquired by the angle-change acquisition means.
 34. An operation apparatus according to claim 33, wherein the angle-change interpreting means interprets the designation as a command for a clockwise rotation operation rotating about the designated fixed position or for a clockwise modification operation with the designated fixed position kept stationary when the acquired angle change is in a clockwise direction.
 35. An operation apparatus according to claim 33, wherein the angle-change interpreting means interprets the designation as a command for a counterclockwise rotation operation rotating about the designated fixed position or for a counterclockwise modification operation with the designated fixed position kept stationary when the acquired angle change is in a counterclockwise direction.
 36. An operation apparatus according to claim 33, wherein the angle-change acquisition means acquires the amount of change in the measured angle, and wherein the angle-change interpreting means interprets the designation as a command for a rotation operation in a rotation direction about the designated fixed position in an amount of rotation responsive to the amount of change or for a modification operation in the rotation direction with the designated fixed position kept stationary.
 37. An operation apparatus according to claim 16, wherein the designated fixed-position-based designation interpreting means comprises: an angle measuring means for measuring an angle made between a reference line and a line that connects the designated positions other than the designated fixed position; an angle-change acquisition means for acquiring a change in the angle measured by the angle measuring means; and an angle-change interpreting means for interpreting the designation based on the angle change acquired by the angle-change acquisition means.
 38. An operation apparatus according to claim 37, wherein the angle-change interpreting means interprets the designation as a command for a clockwise rotation operation rotating about the designated fixed position or for a clockwise modification operation about the center of gravity of a designated moving position with the designated moving position kept stationary when the acquired angle change is in a clockwise direction.
 39. An operation apparatus according to claim 37, wherein the angle-change interpreting means interprets the designation as a command for a counterclockwise rotation operation rotating about the designated fixed position or for a counterclockwise modification operation about the center of gravity of designated moving positions with the designated moving position kept stationary when the acquired angle change is in a counterclockwise direction.
 40. An operation apparatus according to claim 37, wherein the angle-change acquisition means acquires the amount of change in the measured angle, and wherein the angle-change interpreting means interprets the designation as a command for a rotation operation in a rotation direction about the designated fixed position in an amount of rotation responsive to the amount of change or for a modification operation in the rotation direction about the center of gravity of designated moving positions with the designated fixed position kept stationary.
 41. An operation apparatus according to claim 7, wherein the designation interpreting means comprises: a positional-relationship determining means for determining a positional relationship between designated positions; and a positional-relationship-based designation interpreting means for interpreting the designation based on the positional relationship detected by the positional relationship determined by the positional-relationship determining means.
 42. An operation apparatus according to claim 41, wherein the positional-relationship-based designation interpreting means comprises a travel area acquisition means for acquiring the area of travel of the designated position, and interprets the designation as a command for an operation within the acquired area of travel.
 43. An operation apparatus according to claim 41, wherein the positional-relationship-based designation interpreting means interprets the designation as a command for a deleting operation or a cutting operation when the positional relationship determined by the positional-relationship determining means is in a vertical relationship.
 44. An operation apparatus according to claim 41, wherein the positional-relationship-based designation interpreting means interprets the designation as a command for a copying operation when the positional relationship determined by the positional-relationship determining means is in a lateral relationship.
 45. An operation apparatus according to claim 41, wherein the positional-relationship determining means comprises an angle measuring means for measuring the angle made between a reference line and a line that connects a plurality of designated positions, and determines the positional relationship based on the measured angle.
 46. An operation apparatus according to claim 41, wherein the positional-relationship determining means determines the positional relationship to be in a vertical relationship when the angle measured by the angle measuring means falls within a predetermined range with respect to a vertical direction.
 47. An operation apparatus according to claim 41, wherein the positional-relationship determining means determines the positional relationship to be in a lateral relationship when the angle measured by the angle measuring means falls within a predetermined range with respect to a lateral direction.
 48. An operation apparatus according to claim 41, wherein the positional-relationship-based designation interpreting means comprises: a positional-relationship change determining means for determining a change in the determined positional relationship; and a positional-relationship change interpreting means for interpreting the designation based on the positional-relationship change determined by the positional-relationship change determining means.
 49. An operation apparatus according to claim 48, wherein the positional-relationship change interpreting means interprets the designation as a command for one of an inversion operation, a deleting operation, and a cutting operation when the determined positional-relationship change indicates an inversion.
 50. An operation apparatus according to claim 48, wherein the positional-relationship change interpreting means interprets the designation as a command for one of a lateral inversion operation, a deleting operation, and a cutting operation when the determined positional-relationship change indicates a lateral inversion.
 51. An operation apparatus according to claim 48, wherein the positional-relationship change interpreting means interprets the designation as a command for one of a vertical inversion operation, a deleting operation, and a cutting operation when the determined positional-relationship change indicates a vertical inversion.
 52. An operation apparatus according to claim 48, wherein the positional-relationship change interpreting means interprets the designation as a command for one of an expansion operation and a contraction operation when the determined positional-relationship change indicates no change.
 53. An operation apparatus according to claim 48, wherein the positional-relationship change determining means comprises: an angle measuring means for measuring an angle made between a reference line and a line that connects a plurality of designated positions; and an angle-change acquisition means for acquiring a change in the angle measured by the angle measuring means, wherein the positional-relationship change determining means determines the positional-relationship change based on the angle change acquired by the angle-change acquisition means.
 54. An operation apparatus according to claim 53, wherein the positional-relationship change determining means determines the positional-relationship change to be in an inversion when the angle change acquired by the angle-change acquisition means falls within a predetermined bilaterally symmetrical range.
 55. An operation apparatus according to claim 53, wherein the positional-relationship change determining means determines the positional-relationship change to be no change when the angle change acquired by the angle-change acquisition means falls outside a predetermined bilaterally symmetrical range.
 56. An operation apparatus according to claim 48, wherein the positional-relationship change determining means comprises: a lateral positional-relationship determining means for determining that a plurality of designated positions are horizontally aligned; and a lateral positional-relationship change determining means for determining a change in the lateral positional relationship determined by the lateral positional-relationship determining means, wherein the positional-relationship change determining means determines the positional relationship based on the change in the determined lateral positional relationship.
 57. An operation apparatus according to claim 56, wherein the positional-relationship change determining means determines the positional-relationship change to be a lateral inversion when the change in the lateral positional relationship determined by the lateral positional-relationship determining means is a negative value.
 58. An operation apparatus according to claim 56, wherein the positional-relationship change determining means determines the positional-relationship change to be no change when the change in the lateral positional relationship determined by the lateral positional-relationship determining means is a positive value.
 59. An operation apparatus according to claim 48, wherein the positional-relationship change determining means comprises: a vertical positional-relationship determining means for determining that a plurality of designated positions are vertically aligned; and a vertical positional-relationship change determining means for determining a change in the lateral positional relationship determined by the vertical positional-relationship determining means, wherein the positional-relationship change determining means determines the positional relationship based on the change in the lateral positional-relationship determined by the vertical positional-relationship change determining means.
 60. An operation apparatus according to claim 59, wherein the positional-relationship change determining means determines the positional-relationship change to be a vertical inversion when the change in the vertical positional relationship determined by the vertical positional-relationship determining means is a negative value.
 61. An operation apparatus according to claim 59, wherein the positional-relationship change determining means determines the positional-relationship change to be no change when the change in the vertical positional relationship determined by the vertical positional-relationship determining means is a positive value.
 62. An operation apparatus according to claim 41, wherein the positional-relationship determining means comprises: a designated fixed-position detector means for detecting a designated fixed position based on the paths of the plurality of designated positions; and a designated fixed-to-moving-position positional-relationship determining means for determining the positional relationship between the designated fixed position detected by the designated fixed-position detector means and the designated position other than the designated fixed position.
 63. An operation apparatus according to claim 62, wherein the positional-relationship-based designation interpreting means comprises a travel-direction acquisition means for acquiring the direction of travel of the designated position other than the designated fixed position, and wherein the positional-relationship-based designation interpreting means interprets the designation based on the direction of travel acquired by the travel-direction acquisition means and the positional relationship with respect to the designated fixed position.
 64. An operation apparatus according to claim 63, wherein the travel-direction acquisition means comprises a designated position travel distance acquisition means for acquiring the distance of travel of the designated position, and wherein the positional-relationship-based designation interpreting means interprets the designation as a command for an operation having an operational amount responsive to the distance of travel acquired by the designated position travel distance acquisition means.
 65. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated position travel-direction acquisition means is leftward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the right of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of a next-item operation, a next-page operation, a next-screen operation, a last-line operation, and a contraction operation in a lateral direction only.
 66. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is leftward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the left of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of a leftward screen shifting operation and an expansion operation in a lateral direction only.
 67. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is leftward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is above the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a counterclockwise rotation operation.
 68. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is leftward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is below the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a clockwise rotation operation.
 69. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated position travel-direction acquisition means is upward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the right of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a counterclockwise rotation operation.
 70. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is upward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the left of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a clockwise rotation operation.
 71. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is upward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is above the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of an upward screen shifting operation and an expansion operation in a vertical direction only.
 72. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is upward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is below the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of a next-item operation, a next-page operation, a next-screen operation, a last-line operation, and a contraction operation in a vertical direction only.
 73. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated position travel-direction acquisition means is downward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the right of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a clockwise rotation operation.
 74. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is downward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is to the left of the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for a counterclockwise rotation operation.
 75. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is downward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is above the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of a preceding-item operation, a preceding-page operation, a preceding-screen operation, a first-line operation, and a contraction operation in a vertical direction only.
 76. An operation apparatus according to claim 63, wherein when the direction of travel acquired by the designated travel-direction acquisition means is downward, and when the positional relationship determined by the designated fixed-to-moving-position positional-relationship determining means is below the designated fixed position, the positional-relationship-based designation interpreting means interprets the designation as a command for one of a downward screen shifting operation and an expansion 